21566428

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{523}}^1$

素因数の和:614

約数の個数: 36

約数和(自身を含む): 41617128

約数和(自身を除く): 20050700

約数列:

[1, 2, 4, 13, 26, 52, 61, 122, 169, 244, 338, 523, 676, 793, 1046, 1586, 2092, 3172, 6799, 10309, 13598, 20618, 27196, 31903, 41236, 63806, 88387, 127612, 176774, 353548, 414739, 829478, 1658956, 5391607, 10783214, 21566428]

約数ペア:

[(1, 21566428), (2, 10783214), (4, 5391607), (13, 1658956), (26, 829478), (52, 414739), (61, 353548), (122, 176774), (169, 127612), (244, 88387), (338, 63806), (523, 41236), (676, 31903), (793, 27196), (1046, 20618), (1586, 13598), (2092, 10309), (3172, 6799)]