21338900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1021}}^1$

素因数の和:1065

約数の個数: 72

約数和(自身を含む): 53225760

約数和(自身を除く): 31886860

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 44, 50, 55, 76, 95, 100, 110, 190, 209, 220, 275, 380, 418, 475, 550, 836, 950, 1021, 1045, 1100, 1900, 2042, 2090, 4084, 4180, 5105, 5225, 10210, 10450, 11231, 19399, 20420, 20900, 22462, 25525, 38798, 44924, 51050, 56155, 77596, 96995, 102100, 112310, 193990, 213389, 224620, 280775, 387980, 426778, 484975, 561550, 853556, 969950, 1066945, 1123100, 1939900, 2133890, 4267780, 5334725, 10669450, 21338900]

約数ペア:

[(1, 21338900), (2, 10669450), (4, 5334725), (5, 4267780), (10, 2133890), (11, 1939900), (19, 1123100), (20, 1066945), (22, 969950), (25, 853556), (38, 561550), (44, 484975), (50, 426778), (55, 387980), (76, 280775), (95, 224620), (100, 213389), (110, 193990), (190, 112310), (209, 102100), (220, 96995), (275, 77596), (380, 56155), (418, 51050), (475, 44924), (550, 38798), (836, 25525), (950, 22462), (1021, 20900), (1045, 20420), (1100, 19399), (1900, 11231), (2042, 10450), (2090, 10210), (4084, 5225), (4180, 5105)]