81237280

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6427}}^1$

素因数の和:6521

約数の個数: 48

約数和(自身を含む): 194382720

約数和(自身を除く): 113145440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 2528, 3160, 6320, 6427, 12640, 12854, 25708, 32135, 51416, 64270, 102832, 128540, 205664, 257080, 507733, 514160, 1015466, 1028320, 2030932, 2538665, 4061864, 5077330, 8123728, 10154660, 16247456, 20309320, 40618640, 81237280]

約数ペア:

[(1, 81237280), (2, 40618640), (4, 20309320), (5, 16247456), (8, 10154660), (10, 8123728), (16, 5077330), (20, 4061864), (32, 2538665), (40, 2030932), (79, 1028320), (80, 1015466), (158, 514160), (160, 507733), (316, 257080), (395, 205664), (632, 128540), (790, 102832), (1264, 64270), (1580, 51416), (2528, 32135), (3160, 25708), (6320, 12854), (6427, 12640)]