21487765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1$

素因数の和:301

約数の個数: 32

約数和(自身を含む): 29675520

約数和(自身を除く): 8187755

約数列:

[1, 5, 13, 19, 65, 95, 127, 137, 247, 635, 685, 1235, 1651, 1781, 2413, 2603, 8255, 8905, 12065, 13015, 17399, 31369, 33839, 86995, 156845, 169195, 226187, 330581, 1130935, 1652905, 4297553, 21487765]

約数ペア:

[(1, 21487765), (5, 4297553), (13, 1652905), (19, 1130935), (65, 330581), (95, 226187), (127, 169195), (137, 156845), (247, 86995), (635, 33839), (685, 31369), (1235, 17399), (1651, 13015), (1781, 12065), (2413, 8905), (2603, 8255)]