81255440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3539}}^1$

素因数の和:3600

約数の個数: 80

約数和(自身を含む): 221235840

約数和(自身を除く): 139980400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 1148, 1435, 1640, 2296, 2870, 3280, 3539, 4592, 5740, 7078, 11480, 14156, 17695, 22960, 24773, 28312, 35390, 49546, 56624, 70780, 99092, 123865, 141560, 145099, 198184, 247730, 283120, 290198, 396368, 495460, 580396, 725495, 990920, 1015693, 1160792, 1450990, 1981840, 2031386, 2321584, 2901980, 4062772, 5078465, 5803960, 8125544, 10156930, 11607920, 16251088, 20313860, 40627720, 81255440]

約数ペア:

[(1, 81255440), (2, 40627720), (4, 20313860), (5, 16251088), (7, 11607920), (8, 10156930), (10, 8125544), (14, 5803960), (16, 5078465), (20, 4062772), (28, 2901980), (35, 2321584), (40, 2031386), (41, 1981840), (56, 1450990), (70, 1160792), (80, 1015693), (82, 990920), (112, 725495), (140, 580396), (164, 495460), (205, 396368), (280, 290198), (287, 283120), (328, 247730), (410, 198184), (560, 145099), (574, 141560), (656, 123865), (820, 99092), (1148, 70780), (1435, 56624), (1640, 49546), (2296, 35390), (2870, 28312), (3280, 24773), (3539, 22960), (4592, 17695), (5740, 14156), (7078, 11480)]