20320690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{433}}^1$

素因数の和:491

約数の個数: 48

約数和(自身を含む): 41669208

約数和(自身を除く): 21348518

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 361, 433, 494, 722, 866, 1235, 1805, 2165, 2470, 3610, 4330, 4693, 5629, 8227, 9386, 11258, 16454, 23465, 28145, 41135, 46930, 56290, 82270, 106951, 156313, 213902, 312626, 534755, 781565, 1069510, 1563130, 2032069, 4064138, 10160345, 20320690]

約数ペア:

[(1, 20320690), (2, 10160345), (5, 4064138), (10, 2032069), (13, 1563130), (19, 1069510), (26, 781565), (38, 534755), (65, 312626), (95, 213902), (130, 156313), (190, 106951), (247, 82270), (361, 56290), (433, 46930), (494, 41135), (722, 28145), (866, 23465), (1235, 16454), (1805, 11258), (2165, 9386), (2470, 8227), (3610, 5629), (4330, 4693)]