28401680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3989}}^1$

素因数の和:4091

約数の個数: 40

約数和(自身を含む): 66792600

約数和(自身を除く): 38390920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 3989, 7120, 7978, 15956, 19945, 31912, 39890, 63824, 79780, 159560, 319120, 355021, 710042, 1420084, 1775105, 2840168, 3550210, 5680336, 7100420, 14200840, 28401680]

約数ペア:

[(1, 28401680), (2, 14200840), (4, 7100420), (5, 5680336), (8, 3550210), (10, 2840168), (16, 1775105), (20, 1420084), (40, 710042), (80, 355021), (89, 319120), (178, 159560), (356, 79780), (445, 63824), (712, 39890), (890, 31912), (1424, 19945), (1780, 15956), (3560, 7978), (3989, 7120)]