128891980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{12967}}^1$

素因数の和:13054

約数の個数: 48

約数和(自身を含む): 313721856

約数和(自身を除く): 184829876

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 12967, 25934, 51868, 64835, 90769, 129670, 181538, 259340, 363076, 453845, 907690, 920657, 1815380, 1841314, 3682628, 4603285, 6444599, 9206570, 12889198, 18413140, 25778396, 32222995, 64445990, 128891980]

約数ペア:

[(1, 128891980), (2, 64445990), (4, 32222995), (5, 25778396), (7, 18413140), (10, 12889198), (14, 9206570), (20, 6444599), (28, 4603285), (35, 3682628), (70, 1841314), (71, 1815380), (140, 920657), (142, 907690), (284, 453845), (355, 363076), (497, 259340), (710, 181538), (994, 129670), (1420, 90769), (1988, 64835), (2485, 51868), (4970, 25934), (9940, 12967)]