81767240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70489}}^1$

素因数の和:70529

約数の個数: 32

約数和(自身を含む): 190323000

約数和(自身を除く): 108555760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70489, 140978, 281956, 352445, 563912, 704890, 1409780, 2044181, 2819560, 4088362, 8176724, 10220905, 16353448, 20441810, 40883620, 81767240]

約数ペア:

[(1, 81767240), (2, 40883620), (4, 20441810), (5, 16353448), (8, 10220905), (10, 8176724), (20, 4088362), (29, 2819560), (40, 2044181), (58, 1409780), (116, 704890), (145, 563912), (232, 352445), (290, 281956), (580, 140978), (1160, 70489)]