81338460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193663}}^1$

素因数の和:193682

約数の個数: 48

約数和(自身を含む): 260284416

約数和(自身を除く): 178945956

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193663, 387326, 580989, 774652, 968315, 1161978, 1355641, 1936630, 2323956, 2711282, 2904945, 3873260, 4066923, 5422564, 5809890, 6778205, 8133846, 11619780, 13556410, 16267692, 20334615, 27112820, 40669230, 81338460]

約数ペア:

[(1, 81338460), (2, 40669230), (3, 27112820), (4, 20334615), (5, 16267692), (6, 13556410), (7, 11619780), (10, 8133846), (12, 6778205), (14, 5809890), (15, 5422564), (20, 4066923), (21, 3873260), (28, 2904945), (30, 2711282), (35, 2323956), (42, 1936630), (60, 1355641), (70, 1161978), (84, 968315), (105, 774652), (140, 580989), (210, 387326), (420, 193663)]