138808780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{1399}}^1$

素因数の和:1471

約数の個数: 72

約数和(自身を含む): 328456800

約数和(自身を除く): 189648020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 121, 164, 205, 220, 242, 410, 451, 484, 605, 820, 902, 1210, 1399, 1804, 2255, 2420, 2798, 4510, 4961, 5596, 6995, 9020, 9922, 13990, 15389, 19844, 24805, 27980, 30778, 49610, 57359, 61556, 76945, 99220, 114718, 153890, 169279, 229436, 286795, 307780, 338558, 573590, 630949, 677116, 846395, 1147180, 1261898, 1692790, 2523796, 3154745, 3385580, 6309490, 6940439, 12618980, 13880878, 27761756, 34702195, 69404390, 138808780]

約数ペア:

[(1, 138808780), (2, 69404390), (4, 34702195), (5, 27761756), (10, 13880878), (11, 12618980), (20, 6940439), (22, 6309490), (41, 3385580), (44, 3154745), (55, 2523796), (82, 1692790), (110, 1261898), (121, 1147180), (164, 846395), (205, 677116), (220, 630949), (242, 573590), (410, 338558), (451, 307780), (484, 286795), (605, 229436), (820, 169279), (902, 153890), (1210, 114718), (1399, 99220), (1804, 76945), (2255, 61556), (2420, 57359), (2798, 49610), (4510, 30778), (4961, 27980), (5596, 24805), (6995, 19844), (9020, 15389), (9922, 13990)]