21380216

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1699}}^1$

素因数の和:1740

約数の個数: 48

約数和(自身を含む): 47481000

約数和(自身を除く): 26100784

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 121, 143, 242, 286, 484, 572, 968, 1144, 1573, 1699, 3146, 3398, 6292, 6796, 12584, 13592, 18689, 22087, 37378, 44174, 74756, 88348, 149512, 176696, 205579, 242957, 411158, 485914, 822316, 971828, 1644632, 1943656, 2672527, 5345054, 10690108, 21380216]

約数ペア:

[(1, 21380216), (2, 10690108), (4, 5345054), (8, 2672527), (11, 1943656), (13, 1644632), (22, 971828), (26, 822316), (44, 485914), (52, 411158), (88, 242957), (104, 205579), (121, 176696), (143, 149512), (242, 88348), (286, 74756), (484, 44174), (572, 37378), (968, 22087), (1144, 18689), (1573, 13592), (1699, 12584), (3146, 6796), (3398, 6292)]