21103662920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2089}}^1\times {\mathrm{8147}}^1$

素因数の和:10278

約数の個数: 64

約数和(自身を含む): 49044441600

約数和(自身を除く): 27940778680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 2089, 4178, 8147, 8356, 10445, 16294, 16712, 20890, 32588, 40735, 41780, 64759, 65176, 81470, 83560, 129518, 162940, 252557, 259036, 323795, 325880, 505114, 518072, 647590, 1010228, 1262785, 1295180, 2020456, 2525570, 2590360, 5051140, 10102280, 17019083, 34038166, 68076332, 85095415, 136152664, 170190830, 340381660, 527591573, 680763320, 1055183146, 2110366292, 2637957865, 4220732584, 5275915730, 10551831460, 21103662920]

約数ペア:

[(1, 21103662920), (2, 10551831460), (4, 5275915730), (5, 4220732584), (8, 2637957865), (10, 2110366292), (20, 1055183146), (31, 680763320), (40, 527591573), (62, 340381660), (124, 170190830), (155, 136152664), (248, 85095415), (310, 68076332), (620, 34038166), (1240, 17019083), (2089, 10102280), (4178, 5051140), (8147, 2590360), (8356, 2525570), (10445, 2020456), (16294, 1295180), (16712, 1262785), (20890, 1010228), (32588, 647590), (40735, 518072), (41780, 505114), (64759, 325880), (65176, 323795), (81470, 259036), (83560, 252557), (129518, 162940)]