21231164

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 41313888

約数和(自身を除く): 20082724

約数列:

[1, 2, 4, 17, 34, 43, 53, 68, 86, 106, 137, 172, 212, 274, 548, 731, 901, 1462, 1802, 2279, 2329, 2924, 3604, 4558, 4658, 5891, 7261, 9116, 9316, 11782, 14522, 23564, 29044, 38743, 77486, 100147, 123437, 154972, 200294, 246874, 312223, 400588, 493748, 624446, 1248892, 5307791, 10615582, 21231164]

約数ペア:

[(1, 21231164), (2, 10615582), (4, 5307791), (17, 1248892), (34, 624446), (43, 493748), (53, 400588), (68, 312223), (86, 246874), (106, 200294), (137, 154972), (172, 123437), (212, 100147), (274, 77486), (548, 38743), (731, 29044), (901, 23564), (1462, 14522), (1802, 11782), (2279, 9316), (2329, 9116), (2924, 7261), (3604, 5891), (4558, 4658)]