18460520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{271}}^1$

素因数の和:426

約数の個数: 64

約数和(自身を含む): 45239040

約数和(自身を除く): 26778520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 131, 260, 262, 271, 520, 524, 542, 655, 1048, 1084, 1310, 1355, 1703, 2168, 2620, 2710, 3406, 3523, 5240, 5420, 6812, 7046, 8515, 10840, 13624, 14092, 17030, 17615, 28184, 34060, 35230, 35501, 68120, 70460, 71002, 140920, 142004, 177505, 284008, 355010, 461513, 710020, 923026, 1420040, 1846052, 2307565, 3692104, 4615130, 9230260, 18460520]

約数ペア:

[(1, 18460520), (2, 9230260), (4, 4615130), (5, 3692104), (8, 2307565), (10, 1846052), (13, 1420040), (20, 923026), (26, 710020), (40, 461513), (52, 355010), (65, 284008), (104, 177505), (130, 142004), (131, 140920), (260, 71002), (262, 70460), (271, 68120), (520, 35501), (524, 35230), (542, 34060), (655, 28184), (1048, 17615), (1084, 17030), (1310, 14092), (1355, 13624), (1703, 10840), (2168, 8515), (2620, 7046), (2710, 6812), (3406, 5420), (3523, 5240)]