21262425

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{347}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 37973760

約数和(自身を除く): 16711335

約数列:

[1, 3, 5, 15, 19, 25, 43, 57, 75, 95, 129, 215, 285, 347, 475, 645, 817, 1041, 1075, 1425, 1735, 2451, 3225, 4085, 5205, 6593, 8675, 12255, 14921, 19779, 20425, 26025, 32965, 44763, 61275, 74605, 98895, 164825, 223815, 283499, 373025, 494475, 850497, 1119075, 1417495, 4252485, 7087475, 21262425]

約数ペア:

[(1, 21262425), (3, 7087475), (5, 4252485), (15, 1417495), (19, 1119075), (25, 850497), (43, 494475), (57, 373025), (75, 283499), (95, 223815), (129, 164825), (215, 98895), (285, 74605), (347, 61275), (475, 44763), (645, 32965), (817, 26025), (1041, 20425), (1075, 19779), (1425, 14921), (1735, 12255), (2451, 8675), (3225, 6593), (4085, 5205)]