21495591

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1303}}^1$

素因数の和:1372

約数の個数: 32

約数和(自身を含む): 35051520

約数和(自身を除く): 13555929

約数列:

[1, 3, 9, 13, 27, 39, 47, 117, 141, 351, 423, 611, 1269, 1303, 1833, 3909, 5499, 11727, 16497, 16939, 35181, 50817, 61241, 152451, 183723, 457353, 551169, 796133, 1653507, 2388399, 7165197, 21495591]

約数ペア:

[(1, 21495591), (3, 7165197), (9, 2388399), (13, 1653507), (27, 796133), (39, 551169), (47, 457353), (117, 183723), (141, 152451), (351, 61241), (423, 50817), (611, 35181), (1269, 16939), (1303, 16497), (1833, 11727), (3909, 5499)]