28802180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1471}}^1$

素因数の和:1580

約数の個数: 48

約数和(自身を含む): 66769920

約数和(自身を除く): 37967740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1471, 1780, 1958, 2942, 3916, 4895, 5884, 7355, 9790, 14710, 16181, 19580, 29420, 32362, 64724, 80905, 130919, 161810, 261838, 323620, 523676, 654595, 1309190, 1440109, 2618380, 2880218, 5760436, 7200545, 14401090, 28802180]

約数ペア:

[(1, 28802180), (2, 14401090), (4, 7200545), (5, 5760436), (10, 2880218), (11, 2618380), (20, 1440109), (22, 1309190), (44, 654595), (55, 523676), (89, 323620), (110, 261838), (178, 161810), (220, 130919), (356, 80905), (445, 64724), (890, 32362), (979, 29420), (1471, 19580), (1780, 16181), (1958, 14710), (2942, 9790), (3916, 7355), (4895, 5884)]