21328476

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^3\times {\mathrm{809}}^1$

素因数の和:855

約数の個数: 48

約数和(自身を含む): 53978400

約数和(自身を除く): 32649924

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 169, 338, 507, 676, 809, 1014, 1618, 2028, 2197, 2427, 3236, 4394, 4854, 6591, 8788, 9708, 10517, 13182, 21034, 26364, 31551, 42068, 63102, 126204, 136721, 273442, 410163, 546884, 820326, 1640652, 1777373, 3554746, 5332119, 7109492, 10664238, 21328476]

約数ペア:

[(1, 21328476), (2, 10664238), (3, 7109492), (4, 5332119), (6, 3554746), (12, 1777373), (13, 1640652), (26, 820326), (39, 546884), (52, 410163), (78, 273442), (156, 136721), (169, 126204), (338, 63102), (507, 42068), (676, 31551), (809, 26364), (1014, 21034), (1618, 13182), (2028, 10517), (2197, 9708), (2427, 8788), (3236, 6591), (4394, 4854)]