20957684

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:141

約数の個数: 72

約数和(自身を含む): 44241120

約数和(自身を除く): 23283436

約数列:

[1, 2, 4, 11, 19, 22, 38, 43, 44, 53, 76, 86, 106, 121, 172, 209, 212, 242, 418, 473, 484, 583, 817, 836, 946, 1007, 1166, 1634, 1892, 2014, 2279, 2299, 2332, 3268, 4028, 4558, 4598, 5203, 6413, 8987, 9116, 9196, 10406, 11077, 12826, 17974, 20812, 22154, 25069, 25652, 35948, 43301, 44308, 50138, 86602, 98857, 100276, 121847, 173204, 197714, 243694, 275759, 395428, 476311, 487388, 551518, 952622, 1103036, 1905244, 5239421, 10478842, 20957684]

約数ペア:

[(1, 20957684), (2, 10478842), (4, 5239421), (11, 1905244), (19, 1103036), (22, 952622), (38, 551518), (43, 487388), (44, 476311), (53, 395428), (76, 275759), (86, 243694), (106, 197714), (121, 173204), (172, 121847), (209, 100276), (212, 98857), (242, 86602), (418, 50138), (473, 44308), (484, 43301), (583, 35948), (817, 25652), (836, 25069), (946, 22154), (1007, 20812), (1166, 17974), (1634, 12826), (1892, 11077), (2014, 10406), (2279, 9196), (2299, 9116), (2332, 8987), (3268, 6413), (4028, 5203), (4558, 4598)]