2020020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 5721408

約数和(自身を除く): 3701388

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 131, 257, 262, 393, 514, 524, 655, 771, 786, 1028, 1285, 1310, 1542, 1572, 1965, 2570, 2620, 3084, 3855, 3930, 5140, 7710, 7860, 15420, 33667, 67334, 101001, 134668, 168335, 202002, 336670, 404004, 505005, 673340, 1010010, 2020020]

約数ペア:

[(1, 2020020), (2, 1010010), (3, 673340), (4, 505005), (5, 404004), (6, 336670), (10, 202002), (12, 168335), (15, 134668), (20, 101001), (30, 67334), (60, 33667), (131, 15420), (257, 7860), (262, 7710), (393, 5140), (514, 3930), (524, 3855), (655, 3084), (771, 2620), (786, 2570), (1028, 1965), (1285, 1572), (1310, 1542)]