161804920

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{139487}}^1$

素因数の和:139527

約数の個数: 32

約数和(自身を含む): 376617600

約数和(自身を除く): 214812680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 139487, 278974, 557948, 697435, 1115896, 1394870, 2789740, 4045123, 5579480, 8090246, 16180492, 20225615, 32360984, 40451230, 80902460, 161804920]

約数ペア:

[(1, 161804920), (2, 80902460), (4, 40451230), (5, 32360984), (8, 20225615), (10, 16180492), (20, 8090246), (29, 5579480), (40, 4045123), (58, 2789740), (116, 1394870), (145, 1115896), (232, 697435), (290, 557948), (580, 278974), (1160, 139487)]