638934471

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:405

約数の個数: 72

約数和(自身を含む): 1105453440

約数和(自身を除く): 466518969

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 89, 147, 219, 223, 267, 441, 511, 623, 657, 669, 801, 1533, 1561, 1869, 2007, 3577, 4361, 4599, 4683, 5607, 6497, 10731, 10927, 13083, 14049, 16279, 19491, 19847, 32193, 32781, 39249, 45479, 48837, 58473, 59541, 98343, 113953, 136437, 138929, 146511, 178623, 318353, 341859, 409311, 416787, 797671, 955059, 972503, 1025577, 1250361, 1448831, 2393013, 2865177, 2917509, 4346493, 7179039, 8752527, 10141817, 13039479, 30425451, 70992719, 91276353, 212978157, 638934471]

約数ペア:

[(1, 638934471), (3, 212978157), (7, 91276353), (9, 70992719), (21, 30425451), (49, 13039479), (63, 10141817), (73, 8752527), (89, 7179039), (147, 4346493), (219, 2917509), (223, 2865177), (267, 2393013), (441, 1448831), (511, 1250361), (623, 1025577), (657, 972503), (669, 955059), (801, 797671), (1533, 416787), (1561, 409311), (1869, 341859), (2007, 318353), (3577, 178623), (4361, 146511), (4599, 138929), (4683, 136437), (5607, 113953), (6497, 98343), (10731, 59541), (10927, 58473), (13083, 48837), (14049, 45479), (16279, 39249), (19491, 32781), (19847, 32193)]