20152220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{659}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 26417380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 139, 220, 278, 556, 659, 695, 1318, 1390, 1529, 2636, 2780, 3058, 3295, 6116, 6590, 7249, 7645, 13180, 14498, 15290, 28996, 30580, 36245, 72490, 91601, 144980, 183202, 366404, 458005, 916010, 1007611, 1832020, 2015222, 4030444, 5038055, 10076110, 20152220]

約数ペア:

[(1, 20152220), (2, 10076110), (4, 5038055), (5, 4030444), (10, 2015222), (11, 1832020), (20, 1007611), (22, 916010), (44, 458005), (55, 366404), (110, 183202), (139, 144980), (220, 91601), (278, 72490), (556, 36245), (659, 30580), (695, 28996), (1318, 15290), (1390, 14498), (1529, 13180), (2636, 7645), (2780, 7249), (3058, 6590), (3295, 6116)]