20478128

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{307}}^1\times {\mathrm{379}}^1$

素因数の和:705

約数の個数: 40

約数和(自身を含む): 43538880

約数和(自身を除く): 23060752

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 307, 379, 614, 758, 1228, 1516, 2456, 3032, 3377, 4169, 4912, 6064, 6754, 8338, 13508, 16676, 27016, 33352, 54032, 66704, 116353, 232706, 465412, 930824, 1279883, 1861648, 2559766, 5119532, 10239064, 20478128]

約数ペア:

[(1, 20478128), (2, 10239064), (4, 5119532), (8, 2559766), (11, 1861648), (16, 1279883), (22, 930824), (44, 465412), (88, 232706), (176, 116353), (307, 66704), (379, 54032), (614, 33352), (758, 27016), (1228, 16676), (1516, 13508), (2456, 8338), (3032, 6754), (3377, 6064), (4169, 4912)]