21000471505

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{157}}^1\times {\mathrm{2683}}^1$

素因数の和:2930

約数の個数: 48

約数和(自身を含む): 27937863360

約数和(自身を除く): 6937391855

約数列:

[1, 5, 13, 59, 65, 157, 169, 295, 767, 785, 845, 2041, 2683, 3835, 9263, 9971, 10205, 13415, 26533, 34879, 46315, 49855, 120419, 132665, 158297, 174395, 421231, 453427, 602095, 791485, 1565447, 2057861, 2106155, 2267135, 5476003, 7827235, 10289305, 24852629, 26752193, 27380015, 71188039, 124263145, 133760965, 323084177, 355940195, 1615420885, 4200094301, 21000471505]

約数ペア:

[(1, 21000471505), (5, 4200094301), (13, 1615420885), (59, 355940195), (65, 323084177), (157, 133760965), (169, 124263145), (295, 71188039), (767, 27380015), (785, 26752193), (845, 24852629), (2041, 10289305), (2683, 7827235), (3835, 5476003), (9263, 2267135), (9971, 2106155), (10205, 2057861), (13415, 1565447), (26533, 791485), (34879, 602095), (46315, 453427), (49855, 421231), (120419, 174395), (132665, 158297)]