261353560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{523}}^1$

素因数の和:609

約数の個数: 96

約数和(自身を含む): 655618320

約数和(自身を除く): 394264760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 523, 620, 806, 961, 1046, 1240, 1612, 1922, 2015, 2092, 2615, 3224, 3844, 4030, 4184, 4805, 5230, 6799, 7688, 8060, 9610, 10460, 12493, 13598, 16120, 16213, 19220, 20920, 24986, 27196, 32426, 33995, 38440, 49972, 54392, 62465, 64852, 67990, 81065, 99944, 124930, 129704, 135980, 162130, 210769, 249860, 271960, 324260, 421538, 499720, 502603, 648520, 843076, 1005206, 1053845, 1686152, 2010412, 2107690, 2513015, 4020824, 4215380, 5026030, 6533839, 8430760, 10052060, 13067678, 20104120, 26135356, 32669195, 52270712, 65338390, 130676780, 261353560]

約数ペア:

[(1, 261353560), (2, 130676780), (4, 65338390), (5, 52270712), (8, 32669195), (10, 26135356), (13, 20104120), (20, 13067678), (26, 10052060), (31, 8430760), (40, 6533839), (52, 5026030), (62, 4215380), (65, 4020824), (104, 2513015), (124, 2107690), (130, 2010412), (155, 1686152), (248, 1053845), (260, 1005206), (310, 843076), (403, 648520), (520, 502603), (523, 499720), (620, 421538), (806, 324260), (961, 271960), (1046, 249860), (1240, 210769), (1612, 162130), (1922, 135980), (2015, 129704), (2092, 124930), (2615, 99944), (3224, 81065), (3844, 67990), (4030, 64852), (4184, 62465), (4805, 54392), (5230, 49972), (6799, 38440), (7688, 33995), (8060, 32426), (9610, 27196), (10460, 24986), (12493, 20920), (13598, 19220), (16120, 16213)]