21102825

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 16394775

約数列:

[1, 3, 5, 15, 19, 25, 57, 59, 75, 95, 177, 251, 285, 295, 475, 753, 885, 1121, 1255, 1425, 1475, 3363, 3765, 4425, 4769, 5605, 6275, 14307, 14809, 16815, 18825, 23845, 28025, 44427, 71535, 74045, 84075, 119225, 222135, 281371, 357675, 370225, 844113, 1110675, 1406855, 4220565, 7034275, 21102825]

約数ペア:

[(1, 21102825), (3, 7034275), (5, 4220565), (15, 1406855), (19, 1110675), (25, 844113), (57, 370225), (59, 357675), (75, 281371), (95, 222135), (177, 119225), (251, 84075), (285, 74045), (295, 71535), (475, 44427), (753, 28025), (885, 23845), (1121, 18825), (1255, 16815), (1425, 14809), (1475, 14307), (3363, 6275), (3765, 5605), (4425, 4769)]