20325455

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 27143424

約数和(自身を除く): 6817969

約数列:

[1, 5, 17, 43, 67, 83, 85, 215, 335, 415, 731, 1139, 1411, 2881, 3569, 3655, 5561, 5695, 7055, 14405, 17845, 27805, 48977, 60673, 94537, 239123, 244885, 303365, 472685, 1195615, 4065091, 20325455]

約数ペア:

[(1, 20325455), (5, 4065091), (17, 1195615), (43, 472685), (67, 303365), (83, 244885), (85, 239123), (215, 94537), (335, 60673), (415, 48977), (731, 27805), (1139, 17845), (1411, 14405), (2881, 7055), (3569, 5695), (3655, 5561)]