644820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{977}}^1$

素因数の和:1000

約数の個数: 48

約数和(自身を含む): 1971648

約数和(自身を除く): 1326828

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660, 977, 1954, 2931, 3908, 4885, 5862, 9770, 10747, 11724, 14655, 19540, 21494, 29310, 32241, 42988, 53735, 58620, 64482, 107470, 128964, 161205, 214940, 322410, 644820]

約数ペア:

[(1, 644820), (2, 322410), (3, 214940), (4, 161205), (5, 128964), (6, 107470), (10, 64482), (11, 58620), (12, 53735), (15, 42988), (20, 32241), (22, 29310), (30, 21494), (33, 19540), (44, 14655), (55, 11724), (60, 10747), (66, 9770), (110, 5862), (132, 4885), (165, 3908), (220, 2931), (330, 1954), (660, 977)]