20585240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1277}}^1$

素因数の和:1332

約数の個数: 64

約数和(自身を含む): 51528960

約数和(自身を除く): 30943720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1277, 1612, 2015, 2554, 3224, 4030, 5108, 6385, 8060, 10216, 12770, 16120, 16601, 25540, 33202, 39587, 51080, 66404, 79174, 83005, 132808, 158348, 166010, 197935, 316696, 332020, 395870, 514631, 664040, 791740, 1029262, 1583480, 2058524, 2573155, 4117048, 5146310, 10292620, 20585240]

約数ペア:

[(1, 20585240), (2, 10292620), (4, 5146310), (5, 4117048), (8, 2573155), (10, 2058524), (13, 1583480), (20, 1029262), (26, 791740), (31, 664040), (40, 514631), (52, 395870), (62, 332020), (65, 316696), (104, 197935), (124, 166010), (130, 158348), (155, 132808), (248, 83005), (260, 79174), (310, 66404), (403, 51080), (520, 39587), (620, 33202), (806, 25540), (1240, 16601), (1277, 16120), (1612, 12770), (2015, 10216), (2554, 8060), (3224, 6385), (4030, 5108)]