81528760

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{1777}}^1$

素因数の和:1856

約数の個数: 64

約数和(自身を含む): 194584320

約数和(自身を除く): 113055560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 620, 740, 1147, 1240, 1480, 1777, 2294, 3554, 4588, 5735, 7108, 8885, 9176, 11470, 14216, 17770, 22940, 35540, 45880, 55087, 65749, 71080, 110174, 131498, 220348, 262996, 275435, 328745, 440696, 525992, 550870, 657490, 1101740, 1314980, 2038219, 2203480, 2629960, 4076438, 8152876, 10191095, 16305752, 20382190, 40764380, 81528760]

約数ペア:

[(1, 81528760), (2, 40764380), (4, 20382190), (5, 16305752), (8, 10191095), (10, 8152876), (20, 4076438), (31, 2629960), (37, 2203480), (40, 2038219), (62, 1314980), (74, 1101740), (124, 657490), (148, 550870), (155, 525992), (185, 440696), (248, 328745), (296, 275435), (310, 262996), (370, 220348), (620, 131498), (740, 110174), (1147, 71080), (1240, 65749), (1480, 55087), (1777, 45880), (2294, 35540), (3554, 22940), (4588, 17770), (5735, 14216), (7108, 11470), (8885, 9176)]