21065775

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{14783}}^1$

素因数の和:14815

約数の個数: 24

約数和(自身を含む): 36664320

約数和(自身を除く): 15598545

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475, 1425, 14783, 44349, 73915, 221745, 280877, 369575, 842631, 1108725, 1404385, 4213155, 7021925, 21065775]

約数ペア:

[(1, 21065775), (3, 7021925), (5, 4213155), (15, 1404385), (19, 1108725), (25, 842631), (57, 369575), (75, 280877), (95, 221745), (285, 73915), (475, 44349), (1425, 14783)]