28020860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2819}}^1$

素因数の和:2906

約数の個数: 48

約数和(自身を含む): 68221440

約数和(自身を除く): 40200580

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, 2819, 4970, 5638, 9940, 11276, 14095, 19733, 28190, 39466, 56380, 78932, 98665, 197330, 200149, 394660, 400298, 800596, 1000745, 1401043, 2001490, 2802086, 4002980, 5604172, 7005215, 14010430, 28020860]

約数ペア:

[(1, 28020860), (2, 14010430), (4, 7005215), (5, 5604172), (7, 4002980), (10, 2802086), (14, 2001490), (20, 1401043), (28, 1000745), (35, 800596), (70, 400298), (71, 394660), (140, 200149), (142, 197330), (284, 98665), (355, 78932), (497, 56380), (710, 39466), (994, 28190), (1420, 19733), (1988, 14095), (2485, 11276), (2819, 9940), (4970, 5638)]