20852440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10639}}^1$

素因数の和:10664

約数の個数: 48

約数和(自身を含む): 54583200

約数和(自身を除く): 33730760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10639, 21278, 42556, 53195, 74473, 85112, 106390, 148946, 212780, 297892, 372365, 425560, 521311, 595784, 744730, 1042622, 1489460, 2085244, 2606555, 2978920, 4170488, 5213110, 10426220, 20852440]

約数ペア:

[(1, 20852440), (2, 10426220), (4, 5213110), (5, 4170488), (7, 2978920), (8, 2606555), (10, 2085244), (14, 1489460), (20, 1042622), (28, 744730), (35, 595784), (40, 521311), (49, 425560), (56, 372365), (70, 297892), (98, 212780), (140, 148946), (196, 106390), (245, 85112), (280, 74473), (392, 53195), (490, 42556), (980, 21278), (1960, 10639)]