81399720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1297}}^1$

素因数の和:1834

約数の個数: 64

約数和(自身を含む): 244854720

約数和(自身を除く): 163455000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 523, 1046, 1297, 1569, 2092, 2594, 2615, 3138, 3891, 4184, 5188, 5230, 6276, 6485, 7782, 7845, 10376, 10460, 12552, 12970, 15564, 15690, 19455, 20920, 25940, 31128, 31380, 38910, 51880, 62760, 77820, 155640, 678331, 1356662, 2034993, 2713324, 3391655, 4069986, 5426648, 6783310, 8139972, 10174965, 13566620, 16279944, 20349930, 27133240, 40699860, 81399720]

約数ペア:

[(1, 81399720), (2, 40699860), (3, 27133240), (4, 20349930), (5, 16279944), (6, 13566620), (8, 10174965), (10, 8139972), (12, 6783310), (15, 5426648), (20, 4069986), (24, 3391655), (30, 2713324), (40, 2034993), (60, 1356662), (120, 678331), (523, 155640), (1046, 77820), (1297, 62760), (1569, 51880), (2092, 38910), (2594, 31380), (2615, 31128), (3138, 25940), (3891, 20920), (4184, 19455), (5188, 15690), (5230, 15564), (6276, 12970), (6485, 12552), (7782, 10460), (7845, 10376)]