20978204

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1249}}^1$

素因数の和:1302

約数の個数: 48

約数和(自身を含む): 44100000

約数和(自身を除く): 23121796

約数列:

[1, 2, 4, 13, 17, 19, 26, 34, 38, 52, 68, 76, 221, 247, 323, 442, 494, 646, 884, 988, 1249, 1292, 2498, 4199, 4996, 8398, 16237, 16796, 21233, 23731, 32474, 42466, 47462, 64948, 84932, 94924, 276029, 308503, 403427, 552058, 617006, 806854, 1104116, 1234012, 1613708, 5244551, 10489102, 20978204]

約数ペア:

[(1, 20978204), (2, 10489102), (4, 5244551), (13, 1613708), (17, 1234012), (19, 1104116), (26, 806854), (34, 617006), (38, 552058), (52, 403427), (68, 308503), (76, 276029), (221, 94924), (247, 84932), (323, 64948), (442, 47462), (494, 42466), (646, 32474), (884, 23731), (988, 21233), (1249, 16796), (1292, 16237), (2498, 8398), (4199, 4996)]