20478808

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^2\times {\mathrm{1013}}^1$

素因数の和:1064

約数の個数: 48

約数和(自身を含む): 46360080

約数和(自身を除く): 25881272

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 361, 532, 722, 1013, 1064, 1444, 2026, 2527, 2888, 4052, 5054, 7091, 8104, 10108, 14182, 19247, 20216, 28364, 38494, 56728, 76988, 134729, 153976, 269458, 365693, 538916, 731386, 1077832, 1462772, 2559851, 2925544, 5119702, 10239404, 20478808]

約数ペア:

[(1, 20478808), (2, 10239404), (4, 5119702), (7, 2925544), (8, 2559851), (14, 1462772), (19, 1077832), (28, 731386), (38, 538916), (56, 365693), (76, 269458), (133, 153976), (152, 134729), (266, 76988), (361, 56728), (532, 38494), (722, 28364), (1013, 20216), (1064, 19247), (1444, 14182), (2026, 10108), (2527, 8104), (2888, 7091), (4052, 5054)]