21303320

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7949}}^1$

素因数の和:8027

約数の個数: 32

約数和(自身を含む): 48654000

約数和(自身を除く): 27350680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7949, 15898, 31796, 39745, 63592, 79490, 158980, 317960, 532583, 1065166, 2130332, 2662915, 4260664, 5325830, 10651660, 21303320]

約数ペア:

[(1, 21303320), (2, 10651660), (4, 5325830), (5, 4260664), (8, 2662915), (10, 2130332), (20, 1065166), (40, 532583), (67, 317960), (134, 158980), (268, 79490), (335, 63592), (536, 39745), (670, 31796), (1340, 15898), (2680, 7949)]