21538980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{39887}}^1$

素因数の和:39905

約数の個数: 48

約数和(自身を含む): 67011840

約数和(自身を除く): 45472860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 540, 39887, 79774, 119661, 159548, 199435, 239322, 358983, 398870, 478644, 598305, 717966, 797740, 1076949, 1196610, 1435932, 1794915, 2153898, 2393220, 3589830, 4307796, 5384745, 7179660, 10769490, 21538980]

約数ペア:

[(1, 21538980), (2, 10769490), (3, 7179660), (4, 5384745), (5, 4307796), (6, 3589830), (9, 2393220), (10, 2153898), (12, 1794915), (15, 1435932), (18, 1196610), (20, 1076949), (27, 797740), (30, 717966), (36, 598305), (45, 478644), (54, 398870), (60, 358983), (90, 239322), (108, 199435), (135, 159548), (180, 119661), (270, 79774), (540, 39887)]