21157812

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{853}}^1$

素因数の和:929

約数の個数: 72

約数和(自身を含む): 58751784

約数和(自身を除く): 37593972

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 53, 78, 106, 117, 156, 159, 212, 234, 318, 468, 477, 636, 689, 853, 954, 1378, 1706, 1908, 2067, 2559, 2756, 3412, 4134, 5118, 6201, 7677, 8268, 10236, 11089, 12402, 15354, 22178, 24804, 30708, 33267, 44356, 45209, 66534, 90418, 99801, 133068, 135627, 180836, 199602, 271254, 399204, 406881, 542508, 587717, 813762, 1175434, 1627524, 1763151, 2350868, 3526302, 5289453, 7052604, 10578906, 21157812]

約数ペア:

[(1, 21157812), (2, 10578906), (3, 7052604), (4, 5289453), (6, 3526302), (9, 2350868), (12, 1763151), (13, 1627524), (18, 1175434), (26, 813762), (36, 587717), (39, 542508), (52, 406881), (53, 399204), (78, 271254), (106, 199602), (117, 180836), (156, 135627), (159, 133068), (212, 99801), (234, 90418), (318, 66534), (468, 45209), (477, 44356), (636, 33267), (689, 30708), (853, 24804), (954, 22178), (1378, 15354), (1706, 12402), (1908, 11089), (2067, 10236), (2559, 8268), (2756, 7677), (3412, 6201), (4134, 5118)]