21986140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{73}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 52475472

約数和(自身を除く): 30489332

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 73, 74, 110, 146, 148, 185, 220, 292, 365, 370, 407, 730, 740, 803, 814, 1369, 1460, 1606, 1628, 2035, 2701, 2738, 3212, 4015, 4070, 5402, 5476, 6845, 8030, 8140, 10804, 13505, 13690, 15059, 16060, 27010, 27380, 29711, 30118, 54020, 59422, 60236, 75295, 99937, 118844, 148555, 150590, 199874, 297110, 301180, 399748, 499685, 594220, 999370, 1099307, 1998740, 2198614, 4397228, 5496535, 10993070, 21986140]

約数ペア:

[(1, 21986140), (2, 10993070), (4, 5496535), (5, 4397228), (10, 2198614), (11, 1998740), (20, 1099307), (22, 999370), (37, 594220), (44, 499685), (55, 399748), (73, 301180), (74, 297110), (110, 199874), (146, 150590), (148, 148555), (185, 118844), (220, 99937), (292, 75295), (365, 60236), (370, 59422), (407, 54020), (730, 30118), (740, 29711), (803, 27380), (814, 27010), (1369, 16060), (1460, 15059), (1606, 13690), (1628, 13505), (2035, 10804), (2701, 8140), (2738, 8030), (3212, 6845), (4015, 5476), (4070, 5402)]