7991720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{443}}^1$

素因数の和:506

約数の個数: 64

約数和(自身を含む): 20139840

約数和(自身を除く): 12148120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 443, 451, 820, 886, 902, 1640, 1772, 1804, 2215, 2255, 3544, 3608, 4430, 4510, 4873, 8860, 9020, 9746, 17720, 18040, 18163, 19492, 24365, 36326, 38984, 48730, 72652, 90815, 97460, 145304, 181630, 194920, 199793, 363260, 399586, 726520, 799172, 998965, 1598344, 1997930, 3995860, 7991720]

約数ペア:

[(1, 7991720), (2, 3995860), (4, 1997930), (5, 1598344), (8, 998965), (10, 799172), (11, 726520), (20, 399586), (22, 363260), (40, 199793), (41, 194920), (44, 181630), (55, 145304), (82, 97460), (88, 90815), (110, 72652), (164, 48730), (205, 38984), (220, 36326), (328, 24365), (410, 19492), (440, 18163), (443, 18040), (451, 17720), (820, 9746), (886, 9020), (902, 8860), (1640, 4873), (1772, 4510), (1804, 4430), (2215, 3608), (2255, 3544)]