644975968

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{221489}}^1$

素因数の和:221519

約数の個数: 48

約数和(自身を含む): 1562833440

約数和(自身を除く): 917857472

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 221489, 442978, 885956, 1550423, 1771912, 2879357, 3100846, 3543824, 5758714, 6201692, 7087648, 11517428, 12403384, 20155499, 23034856, 24806768, 40310998, 46069712, 49613536, 80621996, 92139424, 161243992, 322487984, 644975968]

約数ペア:

[(1, 644975968), (2, 322487984), (4, 161243992), (7, 92139424), (8, 80621996), (13, 49613536), (14, 46069712), (16, 40310998), (26, 24806768), (28, 23034856), (32, 20155499), (52, 12403384), (56, 11517428), (91, 7087648), (104, 6201692), (112, 5758714), (182, 3543824), (208, 3100846), (224, 2879357), (364, 1771912), (416, 1550423), (728, 885956), (1456, 442978), (2912, 221489)]