81635440

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12917}}^1$

素因数の和:13009

約数の個数: 40

約数和(自身を含む): 192219840

約数和(自身を除く): 110584400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 12917, 25834, 51668, 64585, 103336, 129170, 206672, 258340, 516680, 1020443, 1033360, 2040886, 4081772, 5102215, 8163544, 10204430, 16327088, 20408860, 40817720, 81635440]

約数ペア:

[(1, 81635440), (2, 40817720), (4, 20408860), (5, 16327088), (8, 10204430), (10, 8163544), (16, 5102215), (20, 4081772), (40, 2040886), (79, 1033360), (80, 1020443), (158, 516680), (316, 258340), (395, 206672), (632, 129170), (790, 103336), (1264, 64585), (1580, 51668), (3160, 25834), (6320, 12917)]