81777640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{3697}}^1$

素因数の和:3794

約数の個数: 64

約数和(自身を含む): 213004800

約数和(自身を除く): 131227160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 1106, 1580, 2212, 2765, 3160, 3697, 4424, 5530, 7394, 11060, 14788, 18485, 22120, 25879, 29576, 36970, 51758, 73940, 103516, 129395, 147880, 207032, 258790, 292063, 517580, 584126, 1035160, 1168252, 1460315, 2044441, 2336504, 2920630, 4088882, 5841260, 8177764, 10222205, 11682520, 16355528, 20444410, 40888820, 81777640]

約数ペア:

[(1, 81777640), (2, 40888820), (4, 20444410), (5, 16355528), (7, 11682520), (8, 10222205), (10, 8177764), (14, 5841260), (20, 4088882), (28, 2920630), (35, 2336504), (40, 2044441), (56, 1460315), (70, 1168252), (79, 1035160), (140, 584126), (158, 517580), (280, 292063), (316, 258790), (395, 207032), (553, 147880), (632, 129395), (790, 103516), (1106, 73940), (1580, 51758), (2212, 36970), (2765, 29576), (3160, 25879), (3697, 22120), (4424, 18485), (5530, 14788), (7394, 11060)]