20875920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6691}}^1$

素因数の和:6720

約数の個数: 80

約数和(自身を含む): 69703872

約数和(自身を除く): 48827952

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6691, 13382, 20073, 26764, 33455, 40146, 53528, 66910, 80292, 86983, 100365, 107056, 133820, 160584, 173966, 200730, 260949, 267640, 321168, 347932, 401460, 434915, 521898, 535280, 695864, 802920, 869830, 1043796, 1304745, 1391728, 1605840, 1739660, 2087592, 2609490, 3479320, 4175184, 5218980, 6958640, 10437960, 20875920]

約数ペア:

[(1, 20875920), (2, 10437960), (3, 6958640), (4, 5218980), (5, 4175184), (6, 3479320), (8, 2609490), (10, 2087592), (12, 1739660), (13, 1605840), (15, 1391728), (16, 1304745), (20, 1043796), (24, 869830), (26, 802920), (30, 695864), (39, 535280), (40, 521898), (48, 434915), (52, 401460), (60, 347932), (65, 321168), (78, 267640), (80, 260949), (104, 200730), (120, 173966), (130, 160584), (156, 133820), (195, 107056), (208, 100365), (240, 86983), (260, 80292), (312, 66910), (390, 53528), (520, 40146), (624, 33455), (780, 26764), (1040, 20073), (1560, 13382), (3120, 6691)]