81181520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{144967}}^1$

素因数の和:144987

約数の個数: 40

約数和(自身を含む): 215712384

約数和(自身を除く): 134530864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 144967, 289934, 579868, 724835, 1014769, 1159736, 1449670, 2029538, 2319472, 2899340, 4059076, 5073845, 5798680, 8118152, 10147690, 11597360, 16236304, 20295380, 40590760, 81181520]

約数ペア:

[(1, 81181520), (2, 40590760), (4, 20295380), (5, 16236304), (7, 11597360), (8, 10147690), (10, 8118152), (14, 5798680), (16, 5073845), (20, 4059076), (28, 2899340), (35, 2319472), (40, 2029538), (56, 1449670), (70, 1159736), (80, 1014769), (112, 724835), (140, 579868), (280, 289934), (560, 144967)]