19787680

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11243}}^1$

素因数の和:11269

約数の個数: 48

約数和(自身を含む): 51002784

約数和(自身を除く): 31215104

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11243, 22486, 44972, 56215, 89944, 112430, 123673, 179888, 224860, 247346, 359776, 449720, 494692, 618365, 899440, 989384, 1236730, 1798880, 1978768, 2473460, 3957536, 4946920, 9893840, 19787680]

約数ペア:

[(1, 19787680), (2, 9893840), (4, 4946920), (5, 3957536), (8, 2473460), (10, 1978768), (11, 1798880), (16, 1236730), (20, 989384), (22, 899440), (32, 618365), (40, 494692), (44, 449720), (55, 359776), (80, 247346), (88, 224860), (110, 179888), (160, 123673), (176, 112430), (220, 89944), (352, 56215), (440, 44972), (880, 22486), (1760, 11243)]