21985245

素因数分解:

$3^2\times 5^1\times {\mathrm{613}}^1\times {\mathrm{797}}^1$

素因数の和:1421

約数の個数: 24

約数和(自身を含む): 38217816

約数和(自身を除く): 16232571

約数列:

[1, 3, 5, 9, 15, 45, 613, 797, 1839, 2391, 3065, 3985, 5517, 7173, 9195, 11955, 27585, 35865, 488561, 1465683, 2442805, 4397049, 7328415, 21985245]

約数ペア:

[(1, 21985245), (3, 7328415), (5, 4397049), (9, 2442805), (15, 1465683), (45, 488561), (613, 35865), (797, 27585), (1839, 11955), (2391, 9195), (3065, 7173), (3985, 5517)]