21901215

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{1249}}^1$

素因数の和:1431

約数の個数: 32

約数和(自身を含む): 40320000

約数和(自身を除く): 18418785

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 167, 501, 835, 1169, 1249, 2505, 3507, 3747, 5845, 6245, 8743, 17535, 18735, 26229, 43715, 131145, 208583, 625749, 1042915, 1460081, 3128745, 4380243, 7300405, 21901215]

約数ペア:

[(1, 21901215), (3, 7300405), (5, 4380243), (7, 3128745), (15, 1460081), (21, 1042915), (35, 625749), (105, 208583), (167, 131145), (501, 43715), (835, 26229), (1169, 18735), (1249, 17535), (2505, 8743), (3507, 6245), (3747, 5845)]