128829640

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{18617}}^1$

素因数の和:18801

約数の個数: 32

約数和(自身を含む): 291557880

約数和(自身を除く): 162728240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 18617, 37234, 74468, 93085, 148936, 186170, 372340, 744680, 3220741, 6441482, 12882964, 16103705, 25765928, 32207410, 64414820, 128829640]

約数ペア:

[(1, 128829640), (2, 64414820), (4, 32207410), (5, 25765928), (8, 16103705), (10, 12882964), (20, 6441482), (40, 3220741), (173, 744680), (346, 372340), (692, 186170), (865, 148936), (1384, 93085), (1730, 74468), (3460, 37234), (6920, 18617)]