20507895

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 37449984

約数和(自身を除く): 16942089

約数列:

[1, 3, 5, 9, 15, 31, 45, 61, 93, 155, 183, 241, 279, 305, 465, 549, 723, 915, 1205, 1395, 1891, 2169, 2745, 3615, 5673, 7471, 9455, 10845, 14701, 17019, 22413, 28365, 37355, 44103, 67239, 73505, 85095, 112065, 132309, 220515, 336195, 455731, 661545, 1367193, 2278655, 4101579, 6835965, 20507895]

約数ペア:

[(1, 20507895), (3, 6835965), (5, 4101579), (9, 2278655), (15, 1367193), (31, 661545), (45, 455731), (61, 336195), (93, 220515), (155, 132309), (183, 112065), (241, 85095), (279, 73505), (305, 67239), (465, 44103), (549, 37355), (723, 28365), (915, 22413), (1205, 17019), (1395, 14701), (1891, 10845), (2169, 9455), (2745, 7471), (3615, 5673)]