78420520

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{5923}}^1$

素因数の和:6265

約数の個数: 32

約数和(自身を含む): 177009120

約数和(自身を除く): 98588600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1655, 2648, 3310, 5923, 6620, 11846, 13240, 23692, 29615, 47384, 59230, 118460, 236920, 1960513, 3921026, 7842052, 9802565, 15684104, 19605130, 39210260, 78420520]

約数ペア:

[(1, 78420520), (2, 39210260), (4, 19605130), (5, 15684104), (8, 9802565), (10, 7842052), (20, 3921026), (40, 1960513), (331, 236920), (662, 118460), (1324, 59230), (1655, 47384), (2648, 29615), (3310, 23692), (5923, 13240), (6620, 11846)]