19959836

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{337}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 40543776

約数和(自身を除く): 20583940

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 67, 68, 134, 221, 268, 337, 442, 674, 871, 884, 1139, 1348, 1742, 2278, 3484, 4381, 4556, 5729, 8762, 11458, 14807, 17524, 22579, 22916, 29614, 45158, 59228, 74477, 90316, 148954, 293527, 297908, 383843, 587054, 767686, 1174108, 1535372, 4989959, 9979918, 19959836]

約数ペア:

[(1, 19959836), (2, 9979918), (4, 4989959), (13, 1535372), (17, 1174108), (26, 767686), (34, 587054), (52, 383843), (67, 297908), (68, 293527), (134, 148954), (221, 90316), (268, 74477), (337, 59228), (442, 45158), (674, 29614), (871, 22916), (884, 22579), (1139, 17524), (1348, 14807), (1742, 11458), (2278, 8762), (3484, 5729), (4381, 4556)]