21803535

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 42479424

約数和(自身を除く): 20675889

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 47, 61, 65, 117, 141, 169, 183, 195, 235, 305, 423, 507, 549, 585, 611, 705, 793, 845, 915, 1521, 1833, 2115, 2379, 2535, 2745, 2867, 3055, 3965, 5499, 7137, 7605, 7943, 8601, 9165, 10309, 11895, 14335, 23829, 25803, 27495, 30927, 35685, 37271, 39715, 43005, 51545, 71487, 92781, 111813, 119145, 129015, 154635, 186355, 335439, 357435, 463905, 484523, 559065, 1453569, 1677195, 2422615, 4360707, 7267845, 21803535]

約数ペア:

[(1, 21803535), (3, 7267845), (5, 4360707), (9, 2422615), (13, 1677195), (15, 1453569), (39, 559065), (45, 484523), (47, 463905), (61, 357435), (65, 335439), (117, 186355), (141, 154635), (169, 129015), (183, 119145), (195, 111813), (235, 92781), (305, 71487), (423, 51545), (507, 43005), (549, 39715), (585, 37271), (611, 35685), (705, 30927), (793, 27495), (845, 25803), (915, 23829), (1521, 14335), (1833, 11895), (2115, 10309), (2379, 9165), (2535, 8601), (2745, 7943), (2867, 7605), (3055, 7137), (3965, 5499)]