20207775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{631}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 38870528

約数和(自身を除く): 18662753

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 61, 75, 105, 175, 183, 305, 427, 525, 631, 915, 1281, 1525, 1893, 2135, 3155, 4417, 4575, 6405, 9465, 10675, 13251, 15775, 22085, 32025, 38491, 47325, 66255, 110425, 115473, 192455, 269437, 331275, 577365, 808311, 962275, 1347185, 2886825, 4041555, 6735925, 20207775]

約数ペア:

[(1, 20207775), (3, 6735925), (5, 4041555), (7, 2886825), (15, 1347185), (21, 962275), (25, 808311), (35, 577365), (61, 331275), (75, 269437), (105, 192455), (175, 115473), (183, 110425), (305, 66255), (427, 47325), (525, 38491), (631, 32025), (915, 22085), (1281, 15775), (1525, 13251), (1893, 10675), (2135, 9465), (3155, 6405), (4417, 4575)]