21958020

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:219

約数の個数: 192

約数和(自身を含む): 80693760

約数和(自身を除く): 58735740

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 37, 42, 45, 54, 60, 63, 70, 74, 84, 90, 105, 108, 111, 126, 135, 140, 148, 157, 180, 185, 189, 210, 222, 252, 259, 270, 314, 315, 333, 370, 378, 420, 444, 471, 518, 540, 555, 628, 630, 666, 740, 756, 777, 785, 942, 945, 999, 1036, 1099, 1110, 1260, 1295, 1332, 1413, 1554, 1570, 1665, 1884, 1890, 1998, 2198, 2220, 2331, 2355, 2590, 2826, 3108, 3140, 3297, 3330, 3780, 3885, 3996, 4239, 4396, 4662, 4710, 4995, 5180, 5495, 5652, 5809, 6594, 6660, 6993, 7065, 7770, 8478, 9324, 9420, 9891, 9990, 10990, 11618, 11655, 13188, 13986, 14130, 15540, 16485, 16956, 17427, 19782, 19980, 21195, 21980, 23236, 23310, 27972, 28260, 29045, 29673, 32970, 34854, 34965, 39564, 40663, 42390, 46620, 49455, 52281, 58090, 59346, 65940, 69708, 69930, 81326, 84780, 87135, 98910, 104562, 116180, 118692, 121989, 139860, 148365, 156843, 162652, 174270, 197820, 203315, 209124, 243978, 261405, 296730, 313686, 348540, 365967, 406630, 487956, 522810, 593460, 609945, 627372, 731934, 784215, 813260, 1045620, 1097901, 1219890, 1463868, 1568430, 1829835, 2195802, 2439780, 3136860, 3659670, 4391604, 5489505, 7319340, 10979010, 21958020]

約数ペア:

[(1, 21958020), (2, 10979010), (3, 7319340), (4, 5489505), (5, 4391604), (6, 3659670), (7, 3136860), (9, 2439780), (10, 2195802), (12, 1829835), (14, 1568430), (15, 1463868), (18, 1219890), (20, 1097901), (21, 1045620), (27, 813260), (28, 784215), (30, 731934), (35, 627372), (36, 609945), (37, 593460), (42, 522810), (45, 487956), (54, 406630), (60, 365967), (63, 348540), (70, 313686), (74, 296730), (84, 261405), (90, 243978), (105, 209124), (108, 203315), (111, 197820), (126, 174270), (135, 162652), (140, 156843), (148, 148365), (157, 139860), (180, 121989), (185, 118692), (189, 116180), (210, 104562), (222, 98910), (252, 87135), (259, 84780), (270, 81326), (314, 69930), (315, 69708), (333, 65940), (370, 59346), (378, 58090), (420, 52281), (444, 49455), (471, 46620), (518, 42390), (540, 40663), (555, 39564), (628, 34965), (630, 34854), (666, 32970), (740, 29673), (756, 29045), (777, 28260), (785, 27972), (942, 23310), (945, 23236), (999, 21980), (1036, 21195), (1099, 19980), (1110, 19782), (1260, 17427), (1295, 16956), (1332, 16485), (1413, 15540), (1554, 14130), (1570, 13986), (1665, 13188), (1884, 11655), (1890, 11618), (1998, 10990), (2198, 9990), (2220, 9891), (2331, 9420), (2355, 9324), (2590, 8478), (2826, 7770), (3108, 7065), (3140, 6993), (3297, 6660), (3330, 6594), (3780, 5809), (3885, 5652), (3996, 5495), (4239, 5180), (4396, 4995), (4662, 4710)]