21000000615

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{82591}}^1$

素因数の和:82700

約数の個数: 64

約数和(自身を含む): 38819561472

約数和(自身を除く): 17819560857

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 67, 69, 115, 165, 201, 253, 335, 345, 737, 759, 1005, 1265, 1541, 2211, 3685, 3795, 4623, 7705, 11055, 16951, 23115, 50853, 82591, 84755, 247773, 254265, 412955, 908501, 1238865, 1899593, 2725503, 4542505, 5533597, 5698779, 9497965, 13627515, 16600791, 20895523, 27667985, 28493895, 60869567, 62686569, 83003955, 104477615, 127272731, 182608701, 304347835, 313432845, 381818193, 636363655, 913043505, 1400000041, 1909090965, 4200000123, 7000000205, 21000000615]

約数ペア:

[(1, 21000000615), (3, 7000000205), (5, 4200000123), (11, 1909090965), (15, 1400000041), (23, 913043505), (33, 636363655), (55, 381818193), (67, 313432845), (69, 304347835), (115, 182608701), (165, 127272731), (201, 104477615), (253, 83003955), (335, 62686569), (345, 60869567), (737, 28493895), (759, 27667985), (1005, 20895523), (1265, 16600791), (1541, 13627515), (2211, 9497965), (3685, 5698779), (3795, 5533597), (4623, 4542505), (7705, 2725503), (11055, 1899593), (16951, 1238865), (23115, 908501), (50853, 412955), (82591, 254265), (84755, 247773)]