20002640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1553}}^1$

素因数の和:1596

約数の個数: 80

約数和(自身を含む): 55496448

約数和(自身を除く): 35493808

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1553, 1610, 1840, 2576, 3106, 3220, 6212, 6440, 7765, 10871, 12424, 12880, 15530, 21742, 24848, 31060, 35719, 43484, 54355, 62120, 71438, 86968, 108710, 124240, 142876, 173936, 178595, 217420, 250033, 285752, 357190, 434840, 500066, 571504, 714380, 869680, 1000132, 1250165, 1428760, 2000264, 2500330, 2857520, 4000528, 5000660, 10001320, 20002640]

約数ペア:

[(1, 20002640), (2, 10001320), (4, 5000660), (5, 4000528), (7, 2857520), (8, 2500330), (10, 2000264), (14, 1428760), (16, 1250165), (20, 1000132), (23, 869680), (28, 714380), (35, 571504), (40, 500066), (46, 434840), (56, 357190), (70, 285752), (80, 250033), (92, 217420), (112, 178595), (115, 173936), (140, 142876), (161, 124240), (184, 108710), (230, 86968), (280, 71438), (322, 62120), (368, 54355), (460, 43484), (560, 35719), (644, 31060), (805, 24848), (920, 21742), (1288, 15530), (1553, 12880), (1610, 12424), (1840, 10871), (2576, 7765), (3106, 6440), (3220, 6212)]