21276520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{467}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 51554880

約数和(自身を除く): 30278360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 67, 68, 85, 134, 136, 170, 268, 335, 340, 467, 536, 670, 680, 934, 1139, 1340, 1868, 2278, 2335, 2680, 3736, 4556, 4670, 5695, 7939, 9112, 9340, 11390, 15878, 18680, 22780, 31289, 31756, 39695, 45560, 62578, 63512, 79390, 125156, 156445, 158780, 250312, 312890, 317560, 531913, 625780, 1063826, 1251560, 2127652, 2659565, 4255304, 5319130, 10638260, 21276520]

約数ペア:

[(1, 21276520), (2, 10638260), (4, 5319130), (5, 4255304), (8, 2659565), (10, 2127652), (17, 1251560), (20, 1063826), (34, 625780), (40, 531913), (67, 317560), (68, 312890), (85, 250312), (134, 158780), (136, 156445), (170, 125156), (268, 79390), (335, 63512), (340, 62578), (467, 45560), (536, 39695), (670, 31756), (680, 31289), (934, 22780), (1139, 18680), (1340, 15878), (1868, 11390), (2278, 9340), (2335, 9112), (2680, 7939), (3736, 5695), (4556, 4670)]