20403828

素因数分解:

$2^2\times 3^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:477

約数の個数: 72

約数和(自身を含む): 54512640

約数和(自身を除く): 34108812

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 31, 36, 47, 62, 93, 94, 124, 141, 186, 188, 279, 282, 372, 389, 423, 558, 564, 778, 846, 1116, 1167, 1457, 1556, 1692, 2334, 2914, 3501, 4371, 4668, 5828, 7002, 8742, 12059, 13113, 14004, 17484, 18283, 24118, 26226, 36177, 36566, 48236, 52452, 54849, 72354, 73132, 108531, 109698, 144708, 164547, 217062, 219396, 329094, 434124, 566773, 658188, 1133546, 1700319, 2267092, 3400638, 5100957, 6801276, 10201914, 20403828]

約数ペア:

[(1, 20403828), (2, 10201914), (3, 6801276), (4, 5100957), (6, 3400638), (9, 2267092), (12, 1700319), (18, 1133546), (31, 658188), (36, 566773), (47, 434124), (62, 329094), (93, 219396), (94, 217062), (124, 164547), (141, 144708), (186, 109698), (188, 108531), (279, 73132), (282, 72354), (372, 54849), (389, 52452), (423, 48236), (558, 36566), (564, 36177), (778, 26226), (846, 24118), (1116, 18283), (1167, 17484), (1457, 14004), (1556, 13113), (1692, 12059), (2334, 8742), (2914, 7002), (3501, 5828), (4371, 4668)]