20994525

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1637}}^1$

素因数の和:1675

約数の個数: 48

約数和(自身を含む): 40622400

約数和(自身を除く): 19627875

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1637, 2565, 4275, 4911, 8185, 12825, 14733, 24555, 31103, 40925, 44199, 73665, 93309, 122775, 155515, 220995, 279927, 368325, 466545, 777575, 839781, 1104975, 1399635, 2332725, 4198905, 6998175, 20994525]

約数ペア:

[(1, 20994525), (3, 6998175), (5, 4198905), (9, 2332725), (15, 1399635), (19, 1104975), (25, 839781), (27, 777575), (45, 466545), (57, 368325), (75, 279927), (95, 220995), (135, 155515), (171, 122775), (225, 93309), (285, 73665), (475, 44199), (513, 40925), (675, 31103), (855, 24555), (1425, 14733), (1637, 12825), (2565, 8185), (4275, 4911)]