21985075

素因数分解:

$5^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:292

約数の個数: 36

約数和(自身を含む): 32187672

約数和(自身を除く): 10202597

約数列:

[1, 5, 7, 25, 35, 49, 131, 137, 175, 245, 655, 685, 917, 959, 1225, 3275, 3425, 4585, 4795, 6419, 6713, 17947, 22925, 23975, 32095, 33565, 89735, 125629, 160475, 167825, 448675, 628145, 879403, 3140725, 4397015, 21985075]

約数ペア:

[(1, 21985075), (5, 4397015), (7, 3140725), (25, 879403), (35, 628145), (49, 448675), (131, 167825), (137, 160475), (175, 125629), (245, 89735), (655, 33565), (685, 32095), (917, 23975), (959, 22925), (1225, 17947), (3275, 6713), (3425, 6419), (4585, 4795)]