21255138

素因数分解:

$2^1\times 3^2\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{347}}^1$

素因数の和:479

約数の個数: 48

約数和(自身を含む): 47882016

約数和(自身を除く): 26626878

約数列:

[1, 2, 3, 6, 9, 18, 41, 82, 83, 123, 166, 246, 249, 347, 369, 498, 694, 738, 747, 1041, 1494, 2082, 3123, 3403, 6246, 6806, 10209, 14227, 20418, 28454, 28801, 30627, 42681, 57602, 61254, 85362, 86403, 128043, 172806, 256086, 259209, 518418, 1180841, 2361682, 3542523, 7085046, 10627569, 21255138]

約数ペア:

[(1, 21255138), (2, 10627569), (3, 7085046), (6, 3542523), (9, 2361682), (18, 1180841), (41, 518418), (82, 259209), (83, 256086), (123, 172806), (166, 128043), (246, 86403), (249, 85362), (347, 61254), (369, 57602), (498, 42681), (694, 30627), (738, 28801), (747, 28454), (1041, 20418), (1494, 14227), (2082, 10209), (3123, 6806), (3403, 6246)]