20681804

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 45358320

約数和(自身を除く): 24676516

約数列:

[1, 2, 4, 11, 13, 19, 22, 26, 38, 44, 52, 76, 121, 143, 173, 209, 242, 247, 286, 346, 418, 484, 494, 572, 692, 836, 988, 1573, 1903, 2249, 2299, 2717, 3146, 3287, 3806, 4498, 4598, 5434, 6292, 6574, 7612, 8996, 9196, 10868, 13148, 20933, 24739, 29887, 36157, 41866, 42731, 49478, 59774, 72314, 83732, 85462, 98956, 119548, 144628, 170924, 272129, 397727, 470041, 544258, 795454, 940082, 1088516, 1590908, 1880164, 5170451, 10340902, 20681804]

約数ペア:

[(1, 20681804), (2, 10340902), (4, 5170451), (11, 1880164), (13, 1590908), (19, 1088516), (22, 940082), (26, 795454), (38, 544258), (44, 470041), (52, 397727), (76, 272129), (121, 170924), (143, 144628), (173, 119548), (209, 98956), (242, 85462), (247, 83732), (286, 72314), (346, 59774), (418, 49478), (484, 42731), (494, 41866), (572, 36157), (692, 29887), (836, 24739), (988, 20933), (1573, 13148), (1903, 10868), (2249, 9196), (2299, 8996), (2717, 7612), (3146, 6574), (3287, 6292), (3806, 5434), (4498, 4598)]