21491921620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{260761}}^1$

素因数の和:261100

約数の個数: 48

約数和(自身を含む): 48758321808

約数和(自身を除く): 27266400188

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 317, 634, 1268, 1585, 3170, 4121, 6340, 8242, 16484, 20605, 41210, 82420, 260761, 521522, 1043044, 1303805, 2607610, 3389893, 5215220, 6779786, 13559572, 16949465, 33898930, 67797860, 82661237, 165322474, 330644948, 413306185, 826612370, 1074596081, 1653224740, 2149192162, 4298384324, 5372980405, 10745960810, 21491921620]

約数ペア:

[(1, 21491921620), (2, 10745960810), (4, 5372980405), (5, 4298384324), (10, 2149192162), (13, 1653224740), (20, 1074596081), (26, 826612370), (52, 413306185), (65, 330644948), (130, 165322474), (260, 82661237), (317, 67797860), (634, 33898930), (1268, 16949465), (1585, 13559572), (3170, 6779786), (4121, 5215220), (6340, 3389893), (8242, 2607610), (16484, 1303805), (20605, 1043044), (41210, 521522), (82420, 260761)]