7778980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1861}}^1$

素因数の和:1900

約数の個数: 48

約数和(自身を含む): 18768960

約数和(自身を除く): 10989980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 1861, 2090, 3722, 4180, 7444, 9305, 18610, 20471, 35359, 37220, 40942, 70718, 81884, 102355, 141436, 176795, 204710, 353590, 388949, 409420, 707180, 777898, 1555796, 1944745, 3889490, 7778980]

約数ペア:

[(1, 7778980), (2, 3889490), (4, 1944745), (5, 1555796), (10, 777898), (11, 707180), (19, 409420), (20, 388949), (22, 353590), (38, 204710), (44, 176795), (55, 141436), (76, 102355), (95, 81884), (110, 70718), (190, 40942), (209, 37220), (220, 35359), (380, 20471), (418, 18610), (836, 9305), (1045, 7444), (1861, 4180), (2090, 3722)]