21075804

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 55495440

約数和(自身を除く): 34419636

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 82, 109, 123, 131, 164, 218, 246, 262, 327, 369, 393, 436, 492, 524, 654, 738, 786, 981, 1179, 1308, 1476, 1572, 1962, 2358, 3924, 4469, 4716, 5371, 8938, 10742, 13407, 14279, 16113, 17876, 21484, 26814, 28558, 32226, 40221, 42837, 48339, 53628, 57116, 64452, 80442, 85674, 96678, 128511, 160884, 171348, 193356, 257022, 514044, 585439, 1170878, 1756317, 2341756, 3512634, 5268951, 7025268, 10537902, 21075804]

約数ペア:

[(1, 21075804), (2, 10537902), (3, 7025268), (4, 5268951), (6, 3512634), (9, 2341756), (12, 1756317), (18, 1170878), (36, 585439), (41, 514044), (82, 257022), (109, 193356), (123, 171348), (131, 160884), (164, 128511), (218, 96678), (246, 85674), (262, 80442), (327, 64452), (369, 57116), (393, 53628), (436, 48339), (492, 42837), (524, 40221), (654, 32226), (738, 28558), (786, 26814), (981, 21484), (1179, 17876), (1308, 16113), (1476, 14279), (1572, 13407), (1962, 10742), (2358, 8938), (3924, 5371), (4469, 4716)]