21498125

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:143

約数の個数: 40

約数和(自身を含む): 30365280

約数和(自身を除く): 8867155

約数列:

[1, 5, 11, 25, 53, 55, 59, 125, 265, 275, 295, 583, 625, 649, 1325, 1375, 1475, 2915, 3127, 3245, 6625, 6875, 7375, 14575, 15635, 16225, 33125, 34397, 36875, 72875, 78175, 81125, 171985, 364375, 390875, 405625, 859925, 1954375, 4299625, 21498125]

約数ペア:

[(1, 21498125), (5, 4299625), (11, 1954375), (25, 859925), (53, 405625), (55, 390875), (59, 364375), (125, 171985), (265, 81125), (275, 78175), (295, 72875), (583, 36875), (625, 34397), (649, 33125), (1325, 16225), (1375, 15635), (1475, 14575), (2915, 7375), (3127, 6875), (3245, 6625)]