21859240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{331}}^1$

素因数の和:482

約数の個数: 64

約数和(自身を含む): 53544960

約数和(自身を除く): 31685720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 127, 130, 254, 260, 331, 508, 520, 635, 662, 1016, 1270, 1324, 1651, 1655, 2540, 2648, 3302, 3310, 4303, 5080, 6604, 6620, 8255, 8606, 13208, 13240, 16510, 17212, 21515, 33020, 34424, 42037, 43030, 66040, 84074, 86060, 168148, 172120, 210185, 336296, 420370, 546481, 840740, 1092962, 1681480, 2185924, 2732405, 4371848, 5464810, 10929620, 21859240]

約数ペア:

[(1, 21859240), (2, 10929620), (4, 5464810), (5, 4371848), (8, 2732405), (10, 2185924), (13, 1681480), (20, 1092962), (26, 840740), (40, 546481), (52, 420370), (65, 336296), (104, 210185), (127, 172120), (130, 168148), (254, 86060), (260, 84074), (331, 66040), (508, 43030), (520, 42037), (635, 34424), (662, 33020), (1016, 21515), (1270, 17212), (1324, 16510), (1651, 13240), (1655, 13208), (2540, 8606), (2648, 8255), (3302, 6620), (3310, 6604), (4303, 5080)]