21353020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4831}}^1$

素因数の和:4870

約数の個数: 48

約数和(自身を含む): 51141888

約数和(自身を除く): 29788868

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4831, 9662, 19324, 24155, 48310, 62803, 82127, 96620, 125606, 164254, 251212, 314015, 328508, 410635, 628030, 821270, 1067651, 1256060, 1642540, 2135302, 4270604, 5338255, 10676510, 21353020]

約数ペア:

[(1, 21353020), (2, 10676510), (4, 5338255), (5, 4270604), (10, 2135302), (13, 1642540), (17, 1256060), (20, 1067651), (26, 821270), (34, 628030), (52, 410635), (65, 328508), (68, 314015), (85, 251212), (130, 164254), (170, 125606), (221, 96620), (260, 82127), (340, 62803), (442, 48310), (884, 24155), (1105, 19324), (2210, 9662), (4420, 4831)]