21720241790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{473311}}^1$

素因数の和:473684

約数の個数: 32

約数和(自身を含む): 42223216896

約数和(自身を除く): 20502975106

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 353, 706, 1765, 3530, 4589, 9178, 22945, 45890, 473311, 946622, 2366555, 4733110, 6153043, 12306086, 30765215, 61530430, 167078783, 334157566, 835393915, 1670787830, 2172024179, 4344048358, 10860120895, 21720241790]

約数ペア:

[(1, 21720241790), (2, 10860120895), (5, 4344048358), (10, 2172024179), (13, 1670787830), (26, 835393915), (65, 334157566), (130, 167078783), (353, 61530430), (706, 30765215), (1765, 12306086), (3530, 6153043), (4589, 4733110), (9178, 2366555), (22945, 946622), (45890, 473311)]