20616440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{967}}^1$

素因数の和:1032

約数の個数: 64

約数和(自身を含む): 51226560

約数和(自身を除く): 30610120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 967, 1066, 1640, 1934, 2132, 2665, 3868, 4264, 4835, 5330, 7736, 9670, 10660, 12571, 19340, 21320, 25142, 38680, 39647, 50284, 62855, 79294, 100568, 125710, 158588, 198235, 251420, 317176, 396470, 502840, 515411, 792940, 1030822, 1585880, 2061644, 2577055, 4123288, 5154110, 10308220, 20616440]

約数ペア:

[(1, 20616440), (2, 10308220), (4, 5154110), (5, 4123288), (8, 2577055), (10, 2061644), (13, 1585880), (20, 1030822), (26, 792940), (40, 515411), (41, 502840), (52, 396470), (65, 317176), (82, 251420), (104, 198235), (130, 158588), (164, 125710), (205, 100568), (260, 79294), (328, 62855), (410, 50284), (520, 39647), (533, 38680), (820, 25142), (967, 21320), (1066, 19340), (1640, 12571), (1934, 10660), (2132, 9670), (2665, 7736), (3868, 5330), (4264, 4835)]