21737919

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 36516480

約数和(自身を除く): 14778561

約数列:

[1, 3, 7, 19, 21, 43, 49, 57, 129, 133, 147, 181, 301, 399, 543, 817, 903, 931, 1267, 2107, 2451, 2793, 3439, 3801, 5719, 6321, 7783, 8869, 10317, 17157, 23349, 24073, 26607, 40033, 54481, 72219, 120099, 147877, 163443, 168511, 381367, 443631, 505533, 1035139, 1144101, 3105417, 7245973, 21737919]

約数ペア:

[(1, 21737919), (3, 7245973), (7, 3105417), (19, 1144101), (21, 1035139), (43, 505533), (49, 443631), (57, 381367), (129, 168511), (133, 163443), (147, 147877), (181, 120099), (301, 72219), (399, 54481), (543, 40033), (817, 26607), (903, 24073), (931, 23349), (1267, 17157), (2107, 10317), (2451, 8869), (2793, 7783), (3439, 6321), (3801, 5719)]