20564520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{419}}^1$

素因数の和:842

約数の個数: 64

約数和(自身を含む): 61992000

約数和(自身を除く): 41427480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 409, 419, 818, 838, 1227, 1257, 1636, 1676, 2045, 2095, 2454, 2514, 3272, 3352, 4090, 4190, 4908, 5028, 6135, 6285, 8180, 8380, 9816, 10056, 12270, 12570, 16360, 16760, 24540, 25140, 49080, 50280, 171371, 342742, 514113, 685484, 856855, 1028226, 1370968, 1713710, 2056452, 2570565, 3427420, 4112904, 5141130, 6854840, 10282260, 20564520]

約数ペア:

[(1, 20564520), (2, 10282260), (3, 6854840), (4, 5141130), (5, 4112904), (6, 3427420), (8, 2570565), (10, 2056452), (12, 1713710), (15, 1370968), (20, 1028226), (24, 856855), (30, 685484), (40, 514113), (60, 342742), (120, 171371), (409, 50280), (419, 49080), (818, 25140), (838, 24540), (1227, 16760), (1257, 16360), (1636, 12570), (1676, 12270), (2045, 10056), (2095, 9816), (2454, 8380), (2514, 8180), (3272, 6285), (3352, 6135), (4090, 5028), (4190, 4908)]