21144760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:225

約数の個数: 128

約数和(自身を含む): 60520320

約数和(自身を除く): 39375560

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 37, 40, 52, 56, 65, 70, 74, 91, 104, 130, 140, 148, 157, 182, 185, 259, 260, 280, 296, 314, 364, 370, 455, 481, 518, 520, 628, 728, 740, 785, 910, 962, 1036, 1099, 1256, 1295, 1480, 1570, 1820, 1924, 2041, 2072, 2198, 2405, 2590, 3140, 3367, 3640, 3848, 4082, 4396, 4810, 5180, 5495, 5809, 6280, 6734, 8164, 8792, 9620, 10205, 10360, 10990, 11618, 13468, 14287, 16328, 16835, 19240, 20410, 21980, 23236, 26936, 28574, 29045, 33670, 40663, 40820, 43960, 46472, 57148, 58090, 67340, 71435, 75517, 81326, 81640, 114296, 116180, 134680, 142870, 151034, 162652, 203315, 232360, 285740, 302068, 325304, 377585, 406630, 528619, 571480, 604136, 755170, 813260, 1057238, 1510340, 1626520, 2114476, 2643095, 3020680, 4228952, 5286190, 10572380, 21144760]

約数ペア:

[(1, 21144760), (2, 10572380), (4, 5286190), (5, 4228952), (7, 3020680), (8, 2643095), (10, 2114476), (13, 1626520), (14, 1510340), (20, 1057238), (26, 813260), (28, 755170), (35, 604136), (37, 571480), (40, 528619), (52, 406630), (56, 377585), (65, 325304), (70, 302068), (74, 285740), (91, 232360), (104, 203315), (130, 162652), (140, 151034), (148, 142870), (157, 134680), (182, 116180), (185, 114296), (259, 81640), (260, 81326), (280, 75517), (296, 71435), (314, 67340), (364, 58090), (370, 57148), (455, 46472), (481, 43960), (518, 40820), (520, 40663), (628, 33670), (728, 29045), (740, 28574), (785, 26936), (910, 23236), (962, 21980), (1036, 20410), (1099, 19240), (1256, 16835), (1295, 16328), (1480, 14287), (1570, 13468), (1820, 11618), (1924, 10990), (2041, 10360), (2072, 10205), (2198, 9620), (2405, 8792), (2590, 8164), (3140, 6734), (3367, 6280), (3640, 5809), (3848, 5495), (4082, 5180), (4396, 4810)]