21295760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^2\times {\mathrm{277}}^1$

素因数の和:352

約数の個数: 60

約数和(自身を含む): 51346044

約数和(自身を除く): 30050284

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 277, 310, 496, 554, 620, 961, 1108, 1240, 1385, 1922, 2216, 2480, 2770, 3844, 4432, 4805, 5540, 7688, 8587, 9610, 11080, 15376, 17174, 19220, 22160, 34348, 38440, 42935, 68696, 76880, 85870, 137392, 171740, 266197, 343480, 532394, 686960, 1064788, 1330985, 2129576, 2661970, 4259152, 5323940, 10647880, 21295760]

約数ペア:

[(1, 21295760), (2, 10647880), (4, 5323940), (5, 4259152), (8, 2661970), (10, 2129576), (16, 1330985), (20, 1064788), (31, 686960), (40, 532394), (62, 343480), (80, 266197), (124, 171740), (155, 137392), (248, 85870), (277, 76880), (310, 68696), (496, 42935), (554, 38440), (620, 34348), (961, 22160), (1108, 19220), (1240, 17174), (1385, 15376), (1922, 11080), (2216, 9610), (2480, 8587), (2770, 7688), (3844, 5540), (4432, 4805)]