21025784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{4931}}^1$

素因数の和:4991

約数の個数: 32

約数和(自身を含む): 43500240

約数和(自身を除く): 22474456

約数列:

[1, 2, 4, 8, 13, 26, 41, 52, 82, 104, 164, 328, 533, 1066, 2132, 4264, 4931, 9862, 19724, 39448, 64103, 128206, 202171, 256412, 404342, 512824, 808684, 1617368, 2628223, 5256446, 10512892, 21025784]

約数ペア:

[(1, 21025784), (2, 10512892), (4, 5256446), (8, 2628223), (13, 1617368), (26, 808684), (41, 512824), (52, 404342), (82, 256412), (104, 202171), (164, 128206), (328, 64103), (533, 39448), (1066, 19724), (2132, 9862), (4264, 4931)]