20399620

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{727}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 25097468

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 61, 92, 115, 122, 230, 244, 305, 460, 610, 727, 1220, 1403, 1454, 2806, 2908, 3635, 5612, 7015, 7270, 14030, 14540, 16721, 28060, 33442, 44347, 66884, 83605, 88694, 167210, 177388, 221735, 334420, 443470, 886940, 1019981, 2039962, 4079924, 5099905, 10199810, 20399620]

約数ペア:

[(1, 20399620), (2, 10199810), (4, 5099905), (5, 4079924), (10, 2039962), (20, 1019981), (23, 886940), (46, 443470), (61, 334420), (92, 221735), (115, 177388), (122, 167210), (230, 88694), (244, 83605), (305, 66884), (460, 44347), (610, 33442), (727, 28060), (1220, 16721), (1403, 14540), (1454, 14030), (2806, 7270), (2908, 7015), (3635, 5612)]