21523960

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{223}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 51609600

約数和(自身を除く): 30085640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 127, 152, 190, 223, 254, 380, 446, 508, 635, 760, 892, 1016, 1115, 1270, 1784, 2230, 2413, 2540, 4237, 4460, 4826, 5080, 8474, 8920, 9652, 12065, 16948, 19304, 21185, 24130, 28321, 33896, 42370, 48260, 56642, 84740, 96520, 113284, 141605, 169480, 226568, 283210, 538099, 566420, 1076198, 1132840, 2152396, 2690495, 4304792, 5380990, 10761980, 21523960]

約数ペア:

[(1, 21523960), (2, 10761980), (4, 5380990), (5, 4304792), (8, 2690495), (10, 2152396), (19, 1132840), (20, 1076198), (38, 566420), (40, 538099), (76, 283210), (95, 226568), (127, 169480), (152, 141605), (190, 113284), (223, 96520), (254, 84740), (380, 56642), (446, 48260), (508, 42370), (635, 33896), (760, 28321), (892, 24130), (1016, 21185), (1115, 19304), (1270, 16948), (1784, 12065), (2230, 9652), (2413, 8920), (2540, 8474), (4237, 5080), (4460, 4826)]