21278838

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{461}}^1$

素因数の和:637

約数の個数: 48

約数和(自身を含む): 49929264

約数和(自身を除く): 28650426

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 157, 294, 314, 461, 471, 922, 942, 1099, 1383, 2198, 2766, 3227, 3297, 6454, 6594, 7693, 9681, 15386, 19362, 22589, 23079, 45178, 46158, 67767, 72377, 135534, 144754, 217131, 434262, 506639, 1013278, 1519917, 3039834, 3546473, 7092946, 10639419, 21278838]

約数ペア:

[(1, 21278838), (2, 10639419), (3, 7092946), (6, 3546473), (7, 3039834), (14, 1519917), (21, 1013278), (42, 506639), (49, 434262), (98, 217131), (147, 144754), (157, 135534), (294, 72377), (314, 67767), (461, 46158), (471, 45178), (922, 23079), (942, 22589), (1099, 19362), (1383, 15386), (2198, 9681), (2766, 7693), (3227, 6594), (3297, 6454)]