208221640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^3\times {\mathrm{3911}}^1$

素因数の和:3955

約数の個数: 64

約数和(自身を含む): 515445120

約数和(自身を除く): 307223480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 1331, 2420, 2662, 3911, 4840, 5324, 6655, 7822, 10648, 13310, 15644, 19555, 26620, 31288, 39110, 43021, 53240, 78220, 86042, 156440, 172084, 215105, 344168, 430210, 473231, 860420, 946462, 1720840, 1892924, 2366155, 3785848, 4732310, 5205541, 9464620, 10411082, 18929240, 20822164, 26027705, 41644328, 52055410, 104110820, 208221640]

約数ペア:

[(1, 208221640), (2, 104110820), (4, 52055410), (5, 41644328), (8, 26027705), (10, 20822164), (11, 18929240), (20, 10411082), (22, 9464620), (40, 5205541), (44, 4732310), (55, 3785848), (88, 2366155), (110, 1892924), (121, 1720840), (220, 946462), (242, 860420), (440, 473231), (484, 430210), (605, 344168), (968, 215105), (1210, 172084), (1331, 156440), (2420, 86042), (2662, 78220), (3911, 53240), (4840, 43021), (5324, 39110), (6655, 31288), (7822, 26620), (10648, 19555), (13310, 15644)]