20419893

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 33611760

約数和(自身を除く): 13191867

約数列:

[1, 3, 9, 13, 37, 39, 53, 89, 111, 117, 159, 267, 333, 477, 481, 689, 801, 1157, 1443, 1961, 2067, 3293, 3471, 4329, 4717, 5883, 6201, 9879, 10413, 14151, 17649, 25493, 29637, 42453, 42809, 61321, 76479, 128427, 174529, 183963, 229437, 385281, 523587, 551889, 1570761, 2268877, 6806631, 20419893]

約数ペア:

[(1, 20419893), (3, 6806631), (9, 2268877), (13, 1570761), (37, 551889), (39, 523587), (53, 385281), (89, 229437), (111, 183963), (117, 174529), (159, 128427), (267, 76479), (333, 61321), (477, 42809), (481, 42453), (689, 29637), (801, 25493), (1157, 17649), (1443, 14151), (1961, 10413), (2067, 9879), (3293, 6201), (3471, 5883), (4329, 4717)]