21032375

素因数分解:

$5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2$

素因数の和:121

約数の個数: 48

約数和(自身を含む): 33074496

約数和(自身を除く): 12042121

約数列:

[1, 5, 7, 13, 25, 35, 43, 65, 91, 125, 175, 215, 301, 325, 455, 559, 875, 1075, 1505, 1625, 1849, 2275, 2795, 3913, 5375, 7525, 9245, 11375, 12943, 13975, 19565, 24037, 37625, 46225, 64715, 69875, 97825, 120185, 168259, 231125, 323575, 489125, 600925, 841295, 1617875, 3004625, 4206475, 21032375]

約数ペア:

[(1, 21032375), (5, 4206475), (7, 3004625), (13, 1617875), (25, 841295), (35, 600925), (43, 489125), (65, 323575), (91, 231125), (125, 168259), (175, 120185), (215, 97825), (301, 69875), (325, 64715), (455, 46225), (559, 37625), (875, 24037), (1075, 19565), (1505, 13975), (1625, 12943), (1849, 11375), (2275, 9245), (2795, 7525), (3913, 5375)]