128779480

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{491}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 297561600

約数和(自身を除く): 168782120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 83, 158, 166, 316, 332, 395, 415, 491, 632, 664, 790, 830, 982, 1580, 1660, 1964, 2455, 3160, 3320, 3928, 4910, 6557, 9820, 13114, 19640, 26228, 32785, 38789, 40753, 52456, 65570, 77578, 81506, 131140, 155156, 163012, 193945, 203765, 262280, 310312, 326024, 387890, 407530, 775780, 815060, 1551560, 1630120, 3219487, 6438974, 12877948, 16097435, 25755896, 32194870, 64389740, 128779480]

約数ペア:

[(1, 128779480), (2, 64389740), (4, 32194870), (5, 25755896), (8, 16097435), (10, 12877948), (20, 6438974), (40, 3219487), (79, 1630120), (83, 1551560), (158, 815060), (166, 775780), (316, 407530), (332, 387890), (395, 326024), (415, 310312), (491, 262280), (632, 203765), (664, 193945), (790, 163012), (830, 155156), (982, 131140), (1580, 81506), (1660, 77578), (1964, 65570), (2455, 52456), (3160, 40753), (3320, 38789), (3928, 32785), (4910, 26228), (6557, 19640), (9820, 13114)]