20480355

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{823}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 41134080

約数和(自身を除く): 20653725

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 79, 105, 237, 315, 395, 553, 711, 823, 1185, 1659, 2469, 2765, 3555, 4115, 4977, 5761, 7407, 8295, 12345, 17283, 24885, 28805, 37035, 51849, 65017, 86415, 195051, 259245, 325085, 455119, 585153, 975255, 1365357, 2275595, 2925765, 4096071, 6826785, 20480355]

約数ペア:

[(1, 20480355), (3, 6826785), (5, 4096071), (7, 2925765), (9, 2275595), (15, 1365357), (21, 975255), (35, 585153), (45, 455119), (63, 325085), (79, 259245), (105, 195051), (237, 86415), (315, 65017), (395, 51849), (553, 37035), (711, 28805), (823, 24885), (1185, 17283), (1659, 12345), (2469, 8295), (2765, 7407), (3555, 5761), (4115, 4977)]