21181405

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{367}}^1$

素因数の和:493

約数の個数: 32

約数和(自身を含む): 31159296

約数和(自身を除く): 9977891

約数列:

[1, 5, 7, 17, 35, 85, 97, 119, 367, 485, 595, 679, 1649, 1835, 2569, 3395, 6239, 8245, 11543, 12845, 31195, 35599, 43673, 57715, 177995, 218365, 249193, 605183, 1245965, 3025915, 4236281, 21181405]

約数ペア:

[(1, 21181405), (5, 4236281), (7, 3025915), (17, 1245965), (35, 605183), (85, 249193), (97, 218365), (119, 177995), (367, 57715), (485, 43673), (595, 35599), (679, 31195), (1649, 12845), (1835, 11543), (2569, 8245), (3395, 6239)]