21152571

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^2$

素因数の和:128

約数の個数: 48

約数和(自身を含む): 34318080

約数和(自身を除く): 13165509

約数列:

[1, 3, 11, 23, 29, 31, 33, 69, 87, 93, 253, 319, 341, 667, 713, 759, 899, 957, 961, 1023, 2001, 2139, 2697, 2883, 7337, 7843, 9889, 10571, 20677, 22011, 22103, 23529, 27869, 29667, 31713, 62031, 66309, 83607, 227447, 243133, 306559, 640987, 682341, 729399, 919677, 1922961, 7050857, 21152571]

約数ペア:

[(1, 21152571), (3, 7050857), (11, 1922961), (23, 919677), (29, 729399), (31, 682341), (33, 640987), (69, 306559), (87, 243133), (93, 227447), (253, 83607), (319, 66309), (341, 62031), (667, 31713), (713, 29667), (759, 27869), (899, 23529), (957, 22103), (961, 22011), (1023, 20677), (2001, 10571), (2139, 9889), (2697, 7843), (2883, 7337)]