21783580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11969}}^1$

素因数の和:11998

約数の個数: 48

約数和(自身を含む): 56306880

約数和(自身を除く): 34523300

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11969, 23938, 47876, 59845, 83783, 119690, 155597, 167566, 239380, 311194, 335132, 418915, 622388, 777985, 837830, 1089179, 1555970, 1675660, 2178358, 3111940, 4356716, 5445895, 10891790, 21783580]

約数ペア:

[(1, 21783580), (2, 10891790), (4, 5445895), (5, 4356716), (7, 3111940), (10, 2178358), (13, 1675660), (14, 1555970), (20, 1089179), (26, 837830), (28, 777985), (35, 622388), (52, 418915), (65, 335132), (70, 311194), (91, 239380), (130, 167566), (140, 155597), (182, 119690), (260, 83783), (364, 59845), (455, 47876), (910, 23938), (1820, 11969)]