640159974

素因数分解:

$2^1\times 3^2\times {\mathrm{1723}}^1\times {\mathrm{20641}}^1$

素因数の和:22372

約数の個数: 24

約数和(自身を含む): 1387885512

約数和(自身を除く): 747725538

約数列:

[1, 2, 3, 6, 9, 18, 1723, 3446, 5169, 10338, 15507, 20641, 31014, 41282, 61923, 123846, 185769, 371538, 35564443, 71128886, 106693329, 213386658, 320079987, 640159974]

約数ペア:

[(1, 640159974), (2, 320079987), (3, 213386658), (6, 106693329), (9, 71128886), (18, 35564443), (1723, 371538), (3446, 185769), (5169, 123846), (10338, 61923), (15507, 41282), (20641, 31014)]