19563320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{641}}^1$

素因数の和:768

約数の個数: 64

約数和(自身を含む): 50846400

約数和(自身を除く): 31283080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 641, 763, 872, 1090, 1282, 1526, 2180, 2564, 3052, 3205, 3815, 4360, 4487, 5128, 6104, 6410, 7630, 8974, 12820, 15260, 17948, 22435, 25640, 30520, 35896, 44870, 69869, 89740, 139738, 179480, 279476, 349345, 489083, 558952, 698690, 978166, 1397380, 1956332, 2445415, 2794760, 3912664, 4890830, 9781660, 19563320]

約数ペア:

[(1, 19563320), (2, 9781660), (4, 4890830), (5, 3912664), (7, 2794760), (8, 2445415), (10, 1956332), (14, 1397380), (20, 978166), (28, 698690), (35, 558952), (40, 489083), (56, 349345), (70, 279476), (109, 179480), (140, 139738), (218, 89740), (280, 69869), (436, 44870), (545, 35896), (641, 30520), (763, 25640), (872, 22435), (1090, 17948), (1282, 15260), (1526, 12820), (2180, 8974), (2564, 7630), (3052, 6410), (3205, 6104), (3815, 5128), (4360, 4487)]