21740804

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{137}}^1\times {\mathrm{409}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 38813880

約数和(自身を除く): 17073076

約数列:

[1, 2, 4, 97, 137, 194, 274, 388, 409, 548, 818, 1636, 13289, 26578, 39673, 53156, 56033, 79346, 112066, 158692, 224132, 5435201, 10870402, 21740804]

約数ペア:

[(1, 21740804), (2, 10870402), (4, 5435201), (97, 224132), (137, 158692), (194, 112066), (274, 79346), (388, 56033), (409, 53156), (548, 39673), (818, 26578), (1636, 13289)]