20120408

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:480

約数の個数: 64

約数和(自身を含む): 47692800

約数和(自身を除く): 27572392

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 89, 154, 178, 308, 356, 367, 616, 623, 712, 734, 979, 1246, 1468, 1958, 2492, 2569, 2936, 3916, 4037, 4984, 5138, 6853, 7832, 8074, 10276, 13706, 16148, 20552, 27412, 28259, 32296, 32663, 54824, 56518, 65326, 113036, 130652, 226072, 228641, 261304, 359293, 457282, 718586, 914564, 1437172, 1829128, 2515051, 2874344, 5030102, 10060204, 20120408]

約数ペア:

[(1, 20120408), (2, 10060204), (4, 5030102), (7, 2874344), (8, 2515051), (11, 1829128), (14, 1437172), (22, 914564), (28, 718586), (44, 457282), (56, 359293), (77, 261304), (88, 228641), (89, 226072), (154, 130652), (178, 113036), (308, 65326), (356, 56518), (367, 54824), (616, 32663), (623, 32296), (712, 28259), (734, 27412), (979, 20552), (1246, 16148), (1468, 13706), (1958, 10276), (2492, 8074), (2569, 7832), (2936, 6853), (3916, 5138), (4037, 4984)]