20671648

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 42378336

約数和(自身を除く): 21706688

約数列:

[1, 2, 4, 8, 16, 32, 43, 83, 86, 166, 172, 181, 332, 344, 362, 664, 688, 724, 1328, 1376, 1448, 2656, 2896, 3569, 5792, 7138, 7783, 14276, 15023, 15566, 28552, 30046, 31132, 57104, 60092, 62264, 114208, 120184, 124528, 240368, 249056, 480736, 645989, 1291978, 2583956, 5167912, 10335824, 20671648]

約数ペア:

[(1, 20671648), (2, 10335824), (4, 5167912), (8, 2583956), (16, 1291978), (32, 645989), (43, 480736), (83, 249056), (86, 240368), (166, 124528), (172, 120184), (181, 114208), (332, 62264), (344, 60092), (362, 57104), (664, 31132), (688, 30046), (724, 28552), (1328, 15566), (1376, 15023), (1448, 14276), (2656, 7783), (2896, 7138), (3569, 5792)]