21690990

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:519

約数の個数: 80

約数和(自身を含む): 59415840

約数和(自身を除く): 37724850

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 61, 81, 90, 122, 135, 162, 183, 270, 305, 366, 405, 439, 549, 610, 810, 878, 915, 1098, 1317, 1647, 1830, 2195, 2634, 2745, 3294, 3951, 4390, 4941, 5490, 6585, 7902, 8235, 9882, 11853, 13170, 16470, 19755, 23706, 24705, 26779, 35559, 39510, 49410, 53558, 59265, 71118, 80337, 118530, 133895, 160674, 177795, 241011, 267790, 355590, 401685, 482022, 723033, 803370, 1205055, 1446066, 2169099, 2410110, 3615165, 4338198, 7230330, 10845495, 21690990]

約数ペア:

[(1, 21690990), (2, 10845495), (3, 7230330), (5, 4338198), (6, 3615165), (9, 2410110), (10, 2169099), (15, 1446066), (18, 1205055), (27, 803370), (30, 723033), (45, 482022), (54, 401685), (61, 355590), (81, 267790), (90, 241011), (122, 177795), (135, 160674), (162, 133895), (183, 118530), (270, 80337), (305, 71118), (366, 59265), (405, 53558), (439, 49410), (549, 39510), (610, 35559), (810, 26779), (878, 24705), (915, 23706), (1098, 19755), (1317, 16470), (1647, 13170), (1830, 11853), (2195, 9882), (2634, 8235), (2745, 7902), (3294, 6585), (3951, 5490), (4390, 4941)]