19712420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10831}}^1$

素因数の和:10860

約数の個数: 48

約数和(自身を含む): 50953728

約数和(自身を除く): 31241308

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10831, 21662, 43324, 54155, 75817, 108310, 140803, 151634, 216620, 281606, 303268, 379085, 563212, 704015, 758170, 985621, 1408030, 1516340, 1971242, 2816060, 3942484, 4928105, 9856210, 19712420]

約数ペア:

[(1, 19712420), (2, 9856210), (4, 4928105), (5, 3942484), (7, 2816060), (10, 1971242), (13, 1516340), (14, 1408030), (20, 985621), (26, 758170), (28, 704015), (35, 563212), (52, 379085), (65, 303268), (70, 281606), (91, 216620), (130, 151634), (140, 140803), (182, 108310), (260, 75817), (364, 54155), (455, 43324), (910, 21662), (1820, 10831)]