21207990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1283}}^1$

素因数の和:1341

約数の個数: 64

約数和(自身を含む): 55468800

約数和(自身を除く): 34260810

約数列:

[1, 2, 3, 5, 6, 10, 15, 19, 29, 30, 38, 57, 58, 87, 95, 114, 145, 174, 190, 285, 290, 435, 551, 570, 870, 1102, 1283, 1653, 2566, 2755, 3306, 3849, 5510, 6415, 7698, 8265, 12830, 16530, 19245, 24377, 37207, 38490, 48754, 73131, 74414, 111621, 121885, 146262, 186035, 223242, 243770, 365655, 372070, 558105, 706933, 731310, 1116210, 1413866, 2120799, 3534665, 4241598, 7069330, 10603995, 21207990]

約数ペア:

[(1, 21207990), (2, 10603995), (3, 7069330), (5, 4241598), (6, 3534665), (10, 2120799), (15, 1413866), (19, 1116210), (29, 731310), (30, 706933), (38, 558105), (57, 372070), (58, 365655), (87, 243770), (95, 223242), (114, 186035), (145, 146262), (174, 121885), (190, 111621), (285, 74414), (290, 73131), (435, 48754), (551, 38490), (570, 37207), (870, 24377), (1102, 19245), (1283, 16530), (1653, 12830), (2566, 8265), (2755, 7698), (3306, 6415), (3849, 5510)]