28010920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1409}}^1$

素因数の和:1498

約数の個数: 64

約数和(自身を含む): 73094400

約数和(自身を除く): 45083480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1409, 1420, 1988, 2485, 2818, 2840, 3976, 4970, 5636, 7045, 9863, 9940, 11272, 14090, 19726, 19880, 28180, 39452, 49315, 56360, 78904, 98630, 100039, 197260, 200078, 394520, 400156, 500195, 700273, 800312, 1000390, 1400546, 2000780, 2801092, 3501365, 4001560, 5602184, 7002730, 14005460, 28010920]

約数ペア:

[(1, 28010920), (2, 14005460), (4, 7002730), (5, 5602184), (7, 4001560), (8, 3501365), (10, 2801092), (14, 2000780), (20, 1400546), (28, 1000390), (35, 800312), (40, 700273), (56, 500195), (70, 400156), (71, 394520), (140, 200078), (142, 197260), (280, 100039), (284, 98630), (355, 78904), (497, 56360), (568, 49315), (710, 39452), (994, 28180), (1409, 19880), (1420, 19726), (1988, 14090), (2485, 11272), (2818, 9940), (2840, 9863), (3976, 7045), (4970, 5636)]