9781660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{641}}^1$

素因数の和:766

約数の個数: 48

約数和(自身を含む): 23728320

約数和(自身を除く): 13946660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 641, 763, 1090, 1282, 1526, 2180, 2564, 3052, 3205, 3815, 4487, 6410, 7630, 8974, 12820, 15260, 17948, 22435, 44870, 69869, 89740, 139738, 279476, 349345, 489083, 698690, 978166, 1397380, 1956332, 2445415, 4890830, 9781660]

約数ペア:

[(1, 9781660), (2, 4890830), (4, 2445415), (5, 1956332), (7, 1397380), (10, 978166), (14, 698690), (20, 489083), (28, 349345), (35, 279476), (70, 139738), (109, 89740), (140, 69869), (218, 44870), (436, 22435), (545, 17948), (641, 15260), (763, 12820), (1090, 8974), (1282, 7630), (1526, 6410), (2180, 4487), (2564, 3815), (3052, 3205)]