405489340

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1\times {\mathrm{2129}}^1$

素因数の和:2334

約数の個数: 48

約数和(自身を含む): 869551200

約数和(自身を除く): 464061860

約数列:

[1, 2, 4, 5, 10, 20, 89, 107, 178, 214, 356, 428, 445, 535, 890, 1070, 1780, 2129, 2140, 4258, 8516, 9523, 10645, 19046, 21290, 38092, 42580, 47615, 95230, 189481, 190460, 227803, 378962, 455606, 757924, 911212, 947405, 1139015, 1894810, 2278030, 3789620, 4556060, 20274467, 40548934, 81097868, 101372335, 202744670, 405489340]

約数ペア:

[(1, 405489340), (2, 202744670), (4, 101372335), (5, 81097868), (10, 40548934), (20, 20274467), (89, 4556060), (107, 3789620), (178, 2278030), (214, 1894810), (356, 1139015), (428, 947405), (445, 911212), (535, 757924), (890, 455606), (1070, 378962), (1780, 227803), (2129, 190460), (2140, 189481), (4258, 95230), (8516, 47615), (9523, 42580), (10645, 38092), (19046, 21290)]