21369768

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{971}}^1$

素因数の和:1118

約数の個数: 64

約数和(自身を含む): 61585920

約数和(自身を除く): 40216152

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 131, 168, 262, 393, 524, 786, 917, 971, 1048, 1572, 1834, 1942, 2751, 2913, 3144, 3668, 3884, 5502, 5826, 6797, 7336, 7768, 11004, 11652, 13594, 20391, 22008, 23304, 27188, 40782, 54376, 81564, 127201, 163128, 254402, 381603, 508804, 763206, 890407, 1017608, 1526412, 1780814, 2671221, 3052824, 3561628, 5342442, 7123256, 10684884, 21369768]

約数ペア:

[(1, 21369768), (2, 10684884), (3, 7123256), (4, 5342442), (6, 3561628), (7, 3052824), (8, 2671221), (12, 1780814), (14, 1526412), (21, 1017608), (24, 890407), (28, 763206), (42, 508804), (56, 381603), (84, 254402), (131, 163128), (168, 127201), (262, 81564), (393, 54376), (524, 40782), (786, 27188), (917, 23304), (971, 22008), (1048, 20391), (1572, 13594), (1834, 11652), (1942, 11004), (2751, 7768), (2913, 7336), (3144, 6797), (3668, 5826), (3884, 5502)]