21557585

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{317}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 31138560

約数和(自身を除く): 9580975

約数列:

[1, 5, 7, 29, 35, 67, 145, 203, 317, 335, 469, 1015, 1585, 1943, 2219, 2345, 9193, 9715, 11095, 13601, 21239, 45965, 64351, 68005, 106195, 148673, 321755, 615931, 743365, 3079655, 4311517, 21557585]

約数ペア:

[(1, 21557585), (5, 4311517), (7, 3079655), (29, 743365), (35, 615931), (67, 321755), (145, 148673), (203, 106195), (317, 68005), (335, 64351), (469, 45965), (1015, 21239), (1585, 13601), (1943, 11095), (2219, 9715), (2345, 9193)]