21176680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1427}}^1$

素因数の和:1498

約数の個数: 64

約数和(自身を含む): 55520640

約数和(自身を除く): 34343960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1427, 1484, 1855, 2120, 2854, 2968, 3710, 5708, 7135, 7420, 9989, 11416, 14270, 14840, 19978, 28540, 39956, 49945, 57080, 75631, 79912, 99890, 151262, 199780, 302524, 378155, 399560, 529417, 605048, 756310, 1058834, 1512620, 2117668, 2647085, 3025240, 4235336, 5294170, 10588340, 21176680]

約数ペア:

[(1, 21176680), (2, 10588340), (4, 5294170), (5, 4235336), (7, 3025240), (8, 2647085), (10, 2117668), (14, 1512620), (20, 1058834), (28, 756310), (35, 605048), (40, 529417), (53, 399560), (56, 378155), (70, 302524), (106, 199780), (140, 151262), (212, 99890), (265, 79912), (280, 75631), (371, 57080), (424, 49945), (530, 39956), (742, 28540), (1060, 19978), (1427, 14840), (1484, 14270), (1855, 11416), (2120, 9989), (2854, 7420), (2968, 7135), (3710, 5708)]