128896400

素因数分解:

$2^4\times 5^2\times {\mathrm{79}}^1\times {\mathrm{4079}}^1$

素因数の和:4176

約数の個数: 60

約数和(自身を含む): 313670400

約数和(自身を除く): 184774000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 79, 80, 100, 158, 200, 316, 395, 400, 632, 790, 1264, 1580, 1975, 3160, 3950, 4079, 6320, 7900, 8158, 15800, 16316, 20395, 31600, 32632, 40790, 65264, 81580, 101975, 163160, 203950, 322241, 326320, 407900, 644482, 815800, 1288964, 1611205, 1631600, 2577928, 3222410, 5155856, 6444820, 8056025, 12889640, 16112050, 25779280, 32224100, 64448200, 128896400]

約数ペア:

[(1, 128896400), (2, 64448200), (4, 32224100), (5, 25779280), (8, 16112050), (10, 12889640), (16, 8056025), (20, 6444820), (25, 5155856), (40, 3222410), (50, 2577928), (79, 1631600), (80, 1611205), (100, 1288964), (158, 815800), (200, 644482), (316, 407900), (395, 326320), (400, 322241), (632, 203950), (790, 163160), (1264, 101975), (1580, 81580), (1975, 65264), (3160, 40790), (3950, 32632), (4079, 31600), (6320, 20395), (7900, 16316), (8158, 15800)]