21919480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1607}}^1$

素因数の和:1660

約数の個数: 64

約数和(自身を含む): 55572480

約数和(自身を除く): 33653000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1607, 1705, 2728, 3214, 3410, 6428, 6820, 8035, 12856, 13640, 16070, 17677, 32140, 35354, 49817, 64280, 70708, 88385, 99634, 141416, 176770, 199268, 249085, 353540, 398536, 498170, 547987, 707080, 996340, 1095974, 1992680, 2191948, 2739935, 4383896, 5479870, 10959740, 21919480]

約数ペア:

[(1, 21919480), (2, 10959740), (4, 5479870), (5, 4383896), (8, 2739935), (10, 2191948), (11, 1992680), (20, 1095974), (22, 996340), (31, 707080), (40, 547987), (44, 498170), (55, 398536), (62, 353540), (88, 249085), (110, 199268), (124, 176770), (155, 141416), (220, 99634), (248, 88385), (310, 70708), (341, 64280), (440, 49817), (620, 35354), (682, 32140), (1240, 17677), (1364, 16070), (1607, 13640), (1705, 12856), (2728, 8035), (3214, 6820), (3410, 6428)]