18211120

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{11981}}^1$

素因数の和:12013

約数の個数: 40

約数和(自身を含む): 44573040

約数和(自身を除く): 26361920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 11981, 23962, 47924, 59905, 95848, 119810, 191696, 227639, 239620, 455278, 479240, 910556, 958480, 1138195, 1821112, 2276390, 3642224, 4552780, 9105560, 18211120]

約数ペア:

[(1, 18211120), (2, 9105560), (4, 4552780), (5, 3642224), (8, 2276390), (10, 1821112), (16, 1138195), (19, 958480), (20, 910556), (38, 479240), (40, 455278), (76, 239620), (80, 227639), (95, 191696), (152, 119810), (190, 95848), (304, 59905), (380, 47924), (760, 23962), (1520, 11981)]