21287824

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{257}}^1$

素因数の和:463

約数の個数: 40

約数和(自身を含む): 42997248

約数和(自身を除く): 21709424

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 167, 248, 257, 334, 496, 514, 668, 1028, 1336, 2056, 2672, 4112, 5177, 7967, 10354, 15934, 20708, 31868, 41416, 42919, 63736, 82832, 85838, 127472, 171676, 343352, 686704, 1330489, 2660978, 5321956, 10643912, 21287824]

約数ペア:

[(1, 21287824), (2, 10643912), (4, 5321956), (8, 2660978), (16, 1330489), (31, 686704), (62, 343352), (124, 171676), (167, 127472), (248, 85838), (257, 82832), (334, 63736), (496, 42919), (514, 41416), (668, 31868), (1028, 20708), (1336, 15934), (2056, 10354), (2672, 7967), (4112, 5177)]