21259406

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{641}}^1$

素因数の和:776

約数の個数: 32

約数和(自身を含む): 38458368

約数和(自身を除く): 17198962

約数列:

[1, 2, 7, 14, 23, 46, 103, 161, 206, 322, 641, 721, 1282, 1442, 2369, 4487, 4738, 8974, 14743, 16583, 29486, 33166, 66023, 103201, 132046, 206402, 462161, 924322, 1518529, 3037058, 10629703, 21259406]

約数ペア:

[(1, 21259406), (2, 10629703), (7, 3037058), (14, 1518529), (23, 924322), (46, 462161), (103, 206402), (161, 132046), (206, 103201), (322, 66023), (641, 33166), (721, 29486), (1282, 16583), (1442, 14743), (2369, 8974), (4487, 4738)]