12981940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{269}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 29030400

約数和(自身を除く): 16048460

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 127, 190, 254, 269, 380, 508, 538, 635, 1076, 1270, 1345, 2413, 2540, 2690, 4826, 5111, 5380, 9652, 10222, 12065, 20444, 24130, 25555, 34163, 48260, 51110, 68326, 102220, 136652, 170815, 341630, 649097, 683260, 1298194, 2596388, 3245485, 6490970, 12981940]

約数ペア:

[(1, 12981940), (2, 6490970), (4, 3245485), (5, 2596388), (10, 1298194), (19, 683260), (20, 649097), (38, 341630), (76, 170815), (95, 136652), (127, 102220), (190, 68326), (254, 51110), (269, 48260), (380, 34163), (508, 25555), (538, 24130), (635, 20444), (1076, 12065), (1270, 10222), (1345, 9652), (2413, 5380), (2540, 5111), (2690, 4826)]