388518640

素因数分解:

$2^4\times 5^1\times {\mathrm{557}}^1\times {\mathrm{8719}}^1$

素因数の和:9289

約数の個数: 40

約数和(自身を含む): 905031360

約数和(自身を除く): 516512720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 557, 1114, 2228, 2785, 4456, 5570, 8719, 8912, 11140, 17438, 22280, 34876, 43595, 44560, 69752, 87190, 139504, 174380, 348760, 697520, 4856483, 9712966, 19425932, 24282415, 38851864, 48564830, 77703728, 97129660, 194259320, 388518640]

約数ペア:

[(1, 388518640), (2, 194259320), (4, 97129660), (5, 77703728), (8, 48564830), (10, 38851864), (16, 24282415), (20, 19425932), (40, 9712966), (80, 4856483), (557, 697520), (1114, 348760), (2228, 174380), (2785, 139504), (4456, 87190), (5570, 69752), (8719, 44560), (8912, 43595), (11140, 34876), (17438, 22280)]