319444120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{1787}}^1$

素因数の和:1948

約数の個数: 64

約数和(自身を含む): 743450400

約数和(自身を除く): 424006280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 109, 164, 205, 218, 328, 410, 436, 545, 820, 872, 1090, 1640, 1787, 2180, 3574, 4360, 4469, 7148, 8935, 8938, 14296, 17870, 17876, 22345, 35740, 35752, 44690, 71480, 73267, 89380, 146534, 178760, 194783, 293068, 366335, 389566, 586136, 732670, 779132, 973915, 1465340, 1558264, 1947830, 2930680, 3895660, 7791320, 7986103, 15972206, 31944412, 39930515, 63888824, 79861030, 159722060, 319444120]

約数ペア:

[(1, 319444120), (2, 159722060), (4, 79861030), (5, 63888824), (8, 39930515), (10, 31944412), (20, 15972206), (40, 7986103), (41, 7791320), (82, 3895660), (109, 2930680), (164, 1947830), (205, 1558264), (218, 1465340), (328, 973915), (410, 779132), (436, 732670), (545, 586136), (820, 389566), (872, 366335), (1090, 293068), (1640, 194783), (1787, 178760), (2180, 146534), (3574, 89380), (4360, 73267), (4469, 71480), (7148, 44690), (8935, 35752), (8938, 35740), (14296, 22345), (17870, 17876)]