21156858

素因数分解:

$2^1\times 3^2\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{331}}^1$

素因数の和:459

約数の個数: 48

約数和(自身を含む): 47545056

約数和(自身を除く): 26388198

約数列:

[1, 2, 3, 6, 9, 18, 53, 67, 106, 134, 159, 201, 318, 331, 402, 477, 603, 662, 954, 993, 1206, 1986, 2979, 3551, 5958, 7102, 10653, 17543, 21306, 22177, 31959, 35086, 44354, 52629, 63918, 66531, 105258, 133062, 157887, 199593, 315774, 399186, 1175381, 2350762, 3526143, 7052286, 10578429, 21156858]

約数ペア:

[(1, 21156858), (2, 10578429), (3, 7052286), (6, 3526143), (9, 2350762), (18, 1175381), (53, 399186), (67, 315774), (106, 199593), (134, 157887), (159, 133062), (201, 105258), (318, 66531), (331, 63918), (402, 52629), (477, 44354), (603, 35086), (662, 31959), (954, 22177), (993, 21306), (1206, 17543), (1986, 10653), (2979, 7102), (3551, 5958)]