20918925

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1823}}^1$

素因数の和:1859

約数の個数: 48

約数和(自身を含む): 40711680

約数和(自身を除く): 19792755

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 135, 153, 225, 255, 425, 459, 675, 765, 1275, 1823, 2295, 3825, 5469, 9115, 11475, 16407, 27345, 30991, 45575, 49221, 82035, 92973, 136725, 154955, 246105, 278919, 410175, 464865, 774775, 836757, 1230525, 1394595, 2324325, 4183785, 6972975, 20918925]

約数ペア:

[(1, 20918925), (3, 6972975), (5, 4183785), (9, 2324325), (15, 1394595), (17, 1230525), (25, 836757), (27, 774775), (45, 464865), (51, 410175), (75, 278919), (85, 246105), (135, 154955), (153, 136725), (225, 92973), (255, 82035), (425, 49221), (459, 45575), (675, 30991), (765, 27345), (1275, 16407), (1823, 11475), (2295, 9115), (3825, 5469)]