21876280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{607}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 53187840

約数和(自身を除く): 31311560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 53, 68, 85, 106, 136, 170, 212, 265, 340, 424, 530, 607, 680, 901, 1060, 1214, 1802, 2120, 2428, 3035, 3604, 4505, 4856, 6070, 7208, 9010, 10319, 12140, 18020, 20638, 24280, 32171, 36040, 41276, 51595, 64342, 82552, 103190, 128684, 160855, 206380, 257368, 321710, 412760, 546907, 643420, 1093814, 1286840, 2187628, 2734535, 4375256, 5469070, 10938140, 21876280]

約数ペア:

[(1, 21876280), (2, 10938140), (4, 5469070), (5, 4375256), (8, 2734535), (10, 2187628), (17, 1286840), (20, 1093814), (34, 643420), (40, 546907), (53, 412760), (68, 321710), (85, 257368), (106, 206380), (136, 160855), (170, 128684), (212, 103190), (265, 82552), (340, 64342), (424, 51595), (530, 41276), (607, 36040), (680, 32171), (901, 24280), (1060, 20638), (1214, 18020), (1802, 12140), (2120, 10319), (2428, 9010), (3035, 7208), (3604, 6070), (4505, 4856)]