21278586

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{277}}^1$

素因数の和:379

約数の個数: 64

約数和(自身を含む): 51240960

約数和(自身を除く): 29962374

約数列:

[1, 2, 3, 6, 7, 14, 21, 31, 42, 59, 62, 93, 118, 177, 186, 217, 277, 354, 413, 434, 554, 651, 826, 831, 1239, 1302, 1662, 1829, 1939, 2478, 3658, 3878, 5487, 5817, 8587, 10974, 11634, 12803, 16343, 17174, 25606, 25761, 32686, 38409, 49029, 51522, 60109, 76818, 98058, 114401, 120218, 180327, 228802, 343203, 360654, 506633, 686406, 1013266, 1519899, 3039798, 3546431, 7092862, 10639293, 21278586]

約数ペア:

[(1, 21278586), (2, 10639293), (3, 7092862), (6, 3546431), (7, 3039798), (14, 1519899), (21, 1013266), (31, 686406), (42, 506633), (59, 360654), (62, 343203), (93, 228802), (118, 180327), (177, 120218), (186, 114401), (217, 98058), (277, 76818), (354, 60109), (413, 51522), (434, 49029), (554, 38409), (651, 32686), (826, 25761), (831, 25606), (1239, 17174), (1302, 16343), (1662, 12803), (1829, 11634), (1939, 10974), (2478, 8587), (3658, 5817), (3878, 5487)]