21105075

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16553}}^1$

素因数の和:16583

約数の個数: 24

約数和(自身を含む): 36948528

約数和(自身を除く): 15843453

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16553, 49659, 82765, 248295, 281401, 413825, 844203, 1241475, 1407005, 4221015, 7035025, 21105075]

約数ペア:

[(1, 21105075), (3, 7035025), (5, 4221015), (15, 1407005), (17, 1241475), (25, 844203), (51, 413825), (75, 281401), (85, 248295), (255, 82765), (425, 49659), (1275, 16553)]