20121728

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{461}}^1$

素因数の和:517

約数の個数: 64

約数和(自身を含む): 45239040

約数和(自身を除く): 25117312

約数列:

[1, 2, 4, 8, 11, 16, 22, 31, 32, 44, 62, 64, 88, 124, 128, 176, 248, 341, 352, 461, 496, 682, 704, 922, 992, 1364, 1408, 1844, 1984, 2728, 3688, 3968, 5071, 5456, 7376, 10142, 10912, 14291, 14752, 20284, 21824, 28582, 29504, 40568, 43648, 57164, 59008, 81136, 114328, 157201, 162272, 228656, 314402, 324544, 457312, 628804, 649088, 914624, 1257608, 1829248, 2515216, 5030432, 10060864, 20121728]

約数ペア:

[(1, 20121728), (2, 10060864), (4, 5030432), (8, 2515216), (11, 1829248), (16, 1257608), (22, 914624), (31, 649088), (32, 628804), (44, 457312), (62, 324544), (64, 314402), (88, 228656), (124, 162272), (128, 157201), (176, 114328), (248, 81136), (341, 59008), (352, 57164), (461, 43648), (496, 40568), (682, 29504), (704, 28582), (922, 21824), (992, 20284), (1364, 14752), (1408, 14291), (1844, 10912), (1984, 10142), (2728, 7376), (3688, 5456), (3968, 5071)]