21305325

素因数分解:

$3^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{4001}}^1$

素因数の和:4085

約数の個数: 24

約数和(自身を含む): 35729856

約数和(自身を除く): 14424531

約数列:

[1, 3, 5, 15, 25, 71, 75, 213, 355, 1065, 1775, 4001, 5325, 12003, 20005, 60015, 100025, 284071, 300075, 852213, 1420355, 4261065, 7101775, 21305325]

約数ペア:

[(1, 21305325), (3, 7101775), (5, 4261065), (15, 1420355), (25, 852213), (71, 300075), (75, 284071), (213, 100025), (355, 60015), (1065, 20005), (1775, 12003), (4001, 5325)]