639620787

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{607}}^1\times {\mathrm{659}}^1$

素因数の和:1323

約数の個数: 32

約数和(自身を含む): 943810560

約数和(自身を除く): 304189773

約数列:

[1, 3, 13, 39, 41, 123, 533, 607, 659, 1599, 1821, 1977, 7891, 8567, 23673, 24887, 25701, 27019, 74661, 81057, 323531, 351247, 400013, 970593, 1053741, 1200039, 5200169, 15600507, 16400533, 49201599, 213206929, 639620787]

約数ペア:

[(1, 639620787), (3, 213206929), (13, 49201599), (39, 16400533), (41, 15600507), (123, 5200169), (533, 1200039), (607, 1053741), (659, 970593), (1599, 400013), (1821, 351247), (1977, 323531), (7891, 81057), (8567, 74661), (23673, 27019), (24887, 25701)]