20771240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2393}}^1$

素因数の和:2442

約数の個数: 64

約数和(自身を含む): 55157760

約数和(自身を除く): 34386520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2393, 4340, 4786, 8680, 9572, 11965, 16751, 19144, 23930, 33502, 47860, 67004, 74183, 83755, 95720, 134008, 148366, 167510, 296732, 335020, 370915, 519281, 593464, 670040, 741830, 1038562, 1483660, 2077124, 2596405, 2967320, 4154248, 5192810, 10385620, 20771240]

約数ペア:

[(1, 20771240), (2, 10385620), (4, 5192810), (5, 4154248), (7, 2967320), (8, 2596405), (10, 2077124), (14, 1483660), (20, 1038562), (28, 741830), (31, 670040), (35, 593464), (40, 519281), (56, 370915), (62, 335020), (70, 296732), (124, 167510), (140, 148366), (155, 134008), (217, 95720), (248, 83755), (280, 74183), (310, 67004), (434, 47860), (620, 33502), (868, 23930), (1085, 19144), (1240, 16751), (1736, 11965), (2170, 9572), (2393, 8680), (4340, 4786)]