21510840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13789}}^1$

素因数の和:13816

約数の個数: 64

約数和(自身を含む): 69501600

約数和(自身を除く): 47990760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13789, 27578, 41367, 55156, 68945, 82734, 110312, 137890, 165468, 179257, 206835, 275780, 330936, 358514, 413670, 537771, 551560, 717028, 827340, 896285, 1075542, 1434056, 1654680, 1792570, 2151084, 2688855, 3585140, 4302168, 5377710, 7170280, 10755420, 21510840]

約数ペア:

[(1, 21510840), (2, 10755420), (3, 7170280), (4, 5377710), (5, 4302168), (6, 3585140), (8, 2688855), (10, 2151084), (12, 1792570), (13, 1654680), (15, 1434056), (20, 1075542), (24, 896285), (26, 827340), (30, 717028), (39, 551560), (40, 537771), (52, 413670), (60, 358514), (65, 330936), (78, 275780), (104, 206835), (120, 179257), (130, 165468), (156, 137890), (195, 110312), (260, 82734), (312, 68945), (390, 55156), (520, 41367), (780, 27578), (1560, 13789)]