18755620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{179}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 44271360

約数和(自身を除く): 25515740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 179, 260, 310, 338, 358, 403, 620, 676, 716, 806, 845, 895, 1612, 1690, 1790, 2015, 2327, 3380, 3580, 4030, 4654, 5239, 5549, 8060, 9308, 10478, 11098, 11635, 20956, 22196, 23270, 26195, 27745, 30251, 46540, 52390, 55490, 60502, 72137, 104780, 110980, 121004, 144274, 151255, 288548, 302510, 360685, 605020, 721370, 937781, 1442740, 1875562, 3751124, 4688905, 9377810, 18755620]

約数ペア:

[(1, 18755620), (2, 9377810), (4, 4688905), (5, 3751124), (10, 1875562), (13, 1442740), (20, 937781), (26, 721370), (31, 605020), (52, 360685), (62, 302510), (65, 288548), (124, 151255), (130, 144274), (155, 121004), (169, 110980), (179, 104780), (260, 72137), (310, 60502), (338, 55490), (358, 52390), (403, 46540), (620, 30251), (676, 27745), (716, 26195), (806, 23270), (845, 22196), (895, 20956), (1612, 11635), (1690, 11098), (1790, 10478), (2015, 9308), (2327, 8060), (3380, 5549), (3580, 5239), (4030, 4654)]