21165858

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{971}}^1$

素因数の和:1159

約数の個数: 48

約数和(自身を含む): 52767936

約数和(自身を除く): 31602078

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 173, 346, 519, 971, 1038, 1211, 1557, 1942, 2422, 2913, 3114, 3633, 5826, 6797, 7266, 8739, 10899, 13594, 17478, 20391, 21798, 40782, 61173, 122346, 167983, 335966, 503949, 1007898, 1175881, 1511847, 2351762, 3023694, 3527643, 7055286, 10582929, 21165858]

約数ペア:

[(1, 21165858), (2, 10582929), (3, 7055286), (6, 3527643), (7, 3023694), (9, 2351762), (14, 1511847), (18, 1175881), (21, 1007898), (42, 503949), (63, 335966), (126, 167983), (173, 122346), (346, 61173), (519, 40782), (971, 21798), (1038, 20391), (1211, 17478), (1557, 13594), (1942, 10899), (2422, 8739), (2913, 7266), (3114, 6797), (3633, 5826)]