81015620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^2\times {\mathrm{229}}^1$

素因数の和:290

約数の個数: 108

約数和(自身を含む): 209786220

約数和(自身を除く): 128770600

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 229, 245, 266, 361, 380, 458, 490, 532, 665, 722, 916, 931, 980, 1145, 1330, 1444, 1603, 1805, 1862, 2290, 2527, 2660, 3206, 3610, 3724, 4351, 4580, 4655, 5054, 6412, 7220, 8015, 8702, 9310, 10108, 11221, 12635, 16030, 17404, 17689, 18620, 21755, 22442, 25270, 30457, 32060, 35378, 43510, 44884, 50540, 56105, 60914, 70756, 82669, 87020, 88445, 112210, 121828, 152285, 165338, 176890, 213199, 224420, 304570, 330676, 353780, 413345, 426398, 578683, 609140, 826690, 852796, 1065995, 1157366, 1653380, 2131990, 2314732, 2893415, 4050781, 4263980, 5786830, 8101562, 11573660, 16203124, 20253905, 40507810, 81015620]

約数ペア:

[(1, 81015620), (2, 40507810), (4, 20253905), (5, 16203124), (7, 11573660), (10, 8101562), (14, 5786830), (19, 4263980), (20, 4050781), (28, 2893415), (35, 2314732), (38, 2131990), (49, 1653380), (70, 1157366), (76, 1065995), (95, 852796), (98, 826690), (133, 609140), (140, 578683), (190, 426398), (196, 413345), (229, 353780), (245, 330676), (266, 304570), (361, 224420), (380, 213199), (458, 176890), (490, 165338), (532, 152285), (665, 121828), (722, 112210), (916, 88445), (931, 87020), (980, 82669), (1145, 70756), (1330, 60914), (1444, 56105), (1603, 50540), (1805, 44884), (1862, 43510), (2290, 35378), (2527, 32060), (2660, 30457), (3206, 25270), (3610, 22442), (3724, 21755), (4351, 18620), (4580, 17689), (4655, 17404), (5054, 16030), (6412, 12635), (7220, 11221), (8015, 10108), (8702, 9310)]