20961556

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{269}}^1$

素因数の和:325

約数の個数: 72

約数和(自身を含む): 48263040

約数和(自身を除く): 27301484

約数列:

[1, 2, 4, 7, 11, 14, 22, 23, 28, 44, 46, 77, 92, 121, 154, 161, 242, 253, 269, 308, 322, 484, 506, 538, 644, 847, 1012, 1076, 1694, 1771, 1883, 2783, 2959, 3388, 3542, 3766, 5566, 5918, 6187, 7084, 7532, 11132, 11836, 12374, 19481, 20713, 24748, 32549, 38962, 41426, 43309, 65098, 68057, 77924, 82852, 86618, 130196, 136114, 173236, 227843, 272228, 455686, 476399, 748627, 911372, 952798, 1497254, 1905596, 2994508, 5240389, 10480778, 20961556]

約数ペア:

[(1, 20961556), (2, 10480778), (4, 5240389), (7, 2994508), (11, 1905596), (14, 1497254), (22, 952798), (23, 911372), (28, 748627), (44, 476399), (46, 455686), (77, 272228), (92, 227843), (121, 173236), (154, 136114), (161, 130196), (242, 86618), (253, 82852), (269, 77924), (308, 68057), (322, 65098), (484, 43309), (506, 41426), (538, 38962), (644, 32549), (847, 24748), (1012, 20713), (1076, 19481), (1694, 12374), (1771, 11836), (1883, 11132), (2783, 7532), (2959, 7084), (3388, 6187), (3542, 5918), (3766, 5566)]