21372075

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{47}}^2$

素因数の和:153

約数の個数: 54

約数和(自身を含む): 40021124

約数和(自身を除く): 18649049

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 47, 75, 129, 141, 215, 225, 235, 387, 423, 645, 705, 1075, 1175, 1935, 2021, 2115, 2209, 3225, 3525, 6063, 6627, 9675, 10105, 10575, 11045, 18189, 19881, 30315, 33135, 50525, 55225, 90945, 94987, 99405, 151575, 165675, 284961, 454725, 474935, 497025, 854883, 1424805, 2374675, 4274415, 7124025, 21372075]

約数ペア:

[(1, 21372075), (3, 7124025), (5, 4274415), (9, 2374675), (15, 1424805), (25, 854883), (43, 497025), (45, 474935), (47, 454725), (75, 284961), (129, 165675), (141, 151575), (215, 99405), (225, 94987), (235, 90945), (387, 55225), (423, 50525), (645, 33135), (705, 30315), (1075, 19881), (1175, 18189), (1935, 11045), (2021, 10575), (2115, 10105), (2209, 9675), (3225, 6627), (3525, 6063)]