20121984575

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{811}}^1\times {\mathrm{12889}}^1$

素因数の和:13728

約数の個数: 48

約数和(自身を含む): 31148839680

約数和(自身を除く): 11026855105

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 811, 1925, 4055, 5677, 8921, 12889, 20275, 28385, 44605, 62447, 64445, 90223, 141779, 141925, 223025, 312235, 322225, 451115, 708895, 992453, 1561175, 2255575, 3544475, 4962265, 10452979, 24811325, 52264895, 73170853, 114982769, 261324475, 365854265, 574913845, 804879383, 1829271325, 2874569225, 4024396915, 20121984575]

約数ペア:

[(1, 20121984575), (5, 4024396915), (7, 2874569225), (11, 1829271325), (25, 804879383), (35, 574913845), (55, 365854265), (77, 261324475), (175, 114982769), (275, 73170853), (385, 52264895), (811, 24811325), (1925, 10452979), (4055, 4962265), (5677, 3544475), (8921, 2255575), (12889, 1561175), (20275, 992453), (28385, 708895), (44605, 451115), (62447, 322225), (64445, 312235), (90223, 223025), (141779, 141925)]