81361240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70139}}^1$

素因数の和:70179

約数の個数: 32

約数和(自身を含む): 189378000

約数和(自身を除く): 108016760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70139, 140278, 280556, 350695, 561112, 701390, 1402780, 2034031, 2805560, 4068062, 8136124, 10170155, 16272248, 20340310, 40680620, 81361240]

約数ペア:

[(1, 81361240), (2, 40680620), (4, 20340310), (5, 16272248), (8, 10170155), (10, 8136124), (20, 4068062), (29, 2805560), (40, 2034031), (58, 1402780), (116, 701390), (145, 561112), (232, 350695), (290, 280556), (580, 140278), (1160, 70139)]