21171540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27143}}^1$

素因数の和:27168

約数の個数: 48

約数和(自身を含む): 63842688

約数和(自身を除く): 42671148

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27143, 54286, 81429, 108572, 135715, 162858, 271430, 325716, 352859, 407145, 542860, 705718, 814290, 1058577, 1411436, 1628580, 1764295, 2117154, 3528590, 4234308, 5292885, 7057180, 10585770, 21171540]

約数ペア:

[(1, 21171540), (2, 10585770), (3, 7057180), (4, 5292885), (5, 4234308), (6, 3528590), (10, 2117154), (12, 1764295), (13, 1628580), (15, 1411436), (20, 1058577), (26, 814290), (30, 705718), (39, 542860), (52, 407145), (60, 352859), (65, 325716), (78, 271430), (130, 162858), (156, 135715), (195, 108572), (260, 81429), (390, 54286), (780, 27143)]