20664848

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{683}}^1$

素因数の和:783

約数の個数: 40

約数和(自身を含む): 42068736

約数和(自身を除く): 21403888

約数列:

[1, 2, 4, 8, 16, 31, 61, 62, 122, 124, 244, 248, 488, 496, 683, 976, 1366, 1891, 2732, 3782, 5464, 7564, 10928, 15128, 21173, 30256, 41663, 42346, 83326, 84692, 166652, 169384, 333304, 338768, 666608, 1291553, 2583106, 5166212, 10332424, 20664848]

約数ペア:

[(1, 20664848), (2, 10332424), (4, 5166212), (8, 2583106), (16, 1291553), (31, 666608), (61, 338768), (62, 333304), (122, 169384), (124, 166652), (244, 84692), (248, 83326), (488, 42346), (496, 41663), (683, 30256), (976, 21173), (1366, 15128), (1891, 10928), (2732, 7564), (3782, 5464)]