20912325

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{653}}^1$

素因数の和:734

約数の個数: 48

約数和(自身を含む): 40223616

約数和(自身を除く): 19311291

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 61, 75, 105, 175, 183, 305, 427, 525, 653, 915, 1281, 1525, 1959, 2135, 3265, 4571, 4575, 6405, 9795, 10675, 13713, 16325, 22855, 32025, 39833, 48975, 68565, 114275, 119499, 199165, 278831, 342825, 597495, 836493, 995825, 1394155, 2987475, 4182465, 6970775, 20912325]

約数ペア:

[(1, 20912325), (3, 6970775), (5, 4182465), (7, 2987475), (15, 1394155), (21, 995825), (25, 836493), (35, 597495), (61, 342825), (75, 278831), (105, 199165), (175, 119499), (183, 114275), (305, 68565), (427, 48975), (525, 39833), (653, 32025), (915, 22855), (1281, 16325), (1525, 13713), (1959, 10675), (2135, 9795), (3265, 6405), (4571, 4575)]