21978666

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{541}}^1$

素因数の和:647

約数の個数: 48

約数和(自身を含む): 49801128

約数和(自身を除く): 27822462

約数列:

[1, 2, 3, 6, 9, 18, 37, 61, 74, 111, 122, 183, 222, 333, 366, 541, 549, 666, 1082, 1098, 1623, 2257, 3246, 4514, 4869, 6771, 9738, 13542, 20017, 20313, 33001, 40034, 40626, 60051, 66002, 99003, 120102, 180153, 198006, 297009, 360306, 594018, 1221037, 2442074, 3663111, 7326222, 10989333, 21978666]

約数ペア:

[(1, 21978666), (2, 10989333), (3, 7326222), (6, 3663111), (9, 2442074), (18, 1221037), (37, 594018), (61, 360306), (74, 297009), (111, 198006), (122, 180153), (183, 120102), (222, 99003), (333, 66002), (366, 60051), (541, 40626), (549, 40034), (666, 33001), (1082, 20313), (1098, 20017), (1623, 13542), (2257, 9738), (3246, 6771), (4514, 4869)]