19866780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:228

約数の個数: 144

約数和(自身を含む): 65563680

約数和(自身を除く): 45696900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 37, 38, 45, 57, 60, 74, 76, 90, 95, 111, 114, 148, 157, 171, 180, 185, 190, 222, 228, 285, 314, 333, 342, 370, 380, 444, 471, 555, 570, 628, 666, 684, 703, 740, 785, 855, 942, 1110, 1140, 1332, 1406, 1413, 1570, 1665, 1710, 1884, 2109, 2220, 2355, 2812, 2826, 2983, 3140, 3330, 3420, 3515, 4218, 4710, 5652, 5809, 5966, 6327, 6660, 7030, 7065, 8436, 8949, 9420, 10545, 11618, 11932, 12654, 14060, 14130, 14915, 17427, 17898, 21090, 23236, 25308, 26847, 28260, 29045, 29830, 31635, 34854, 35796, 42180, 44745, 52281, 53694, 58090, 59660, 63270, 69708, 87135, 89490, 104562, 107388, 110371, 116180, 126540, 134235, 174270, 178980, 209124, 220742, 261405, 268470, 331113, 348540, 441484, 522810, 536940, 551855, 662226, 993339, 1045620, 1103710, 1324452, 1655565, 1986678, 2207420, 3311130, 3973356, 4966695, 6622260, 9933390, 19866780]

約数ペア:

[(1, 19866780), (2, 9933390), (3, 6622260), (4, 4966695), (5, 3973356), (6, 3311130), (9, 2207420), (10, 1986678), (12, 1655565), (15, 1324452), (18, 1103710), (19, 1045620), (20, 993339), (30, 662226), (36, 551855), (37, 536940), (38, 522810), (45, 441484), (57, 348540), (60, 331113), (74, 268470), (76, 261405), (90, 220742), (95, 209124), (111, 178980), (114, 174270), (148, 134235), (157, 126540), (171, 116180), (180, 110371), (185, 107388), (190, 104562), (222, 89490), (228, 87135), (285, 69708), (314, 63270), (333, 59660), (342, 58090), (370, 53694), (380, 52281), (444, 44745), (471, 42180), (555, 35796), (570, 34854), (628, 31635), (666, 29830), (684, 29045), (703, 28260), (740, 26847), (785, 25308), (855, 23236), (942, 21090), (1110, 17898), (1140, 17427), (1332, 14915), (1406, 14130), (1413, 14060), (1570, 12654), (1665, 11932), (1710, 11618), (1884, 10545), (2109, 9420), (2220, 8949), (2355, 8436), (2812, 7065), (2826, 7030), (2983, 6660), (3140, 6327), (3330, 5966), (3420, 5809), (3515, 5652), (4218, 4710)]