21521220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51241}}^1$

素因数の和:51260

約数の個数: 48

約数和(自身を含む): 68869248

約数和(自身を除く): 47348028

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51241, 102482, 153723, 204964, 256205, 307446, 358687, 512410, 614892, 717374, 768615, 1024820, 1076061, 1434748, 1537230, 1793435, 2152122, 3074460, 3586870, 4304244, 5380305, 7173740, 10760610, 21521220]

約数ペア:

[(1, 21521220), (2, 10760610), (3, 7173740), (4, 5380305), (5, 4304244), (6, 3586870), (7, 3074460), (10, 2152122), (12, 1793435), (14, 1537230), (15, 1434748), (20, 1076061), (21, 1024820), (28, 768615), (30, 717374), (35, 614892), (42, 512410), (60, 358687), (70, 307446), (84, 256205), (105, 204964), (140, 153723), (210, 102482), (420, 51241)]