21000816

素因数分解:

$2^4\times 3^3\times {\mathrm{173}}^1\times {\mathrm{281}}^1$

素因数の和:471

約数の個数: 80

約数和(自身を含む): 60844320

約数和(自身を除く): 39843504

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 144, 173, 216, 281, 346, 432, 519, 562, 692, 843, 1038, 1124, 1384, 1557, 1686, 2076, 2248, 2529, 2768, 3114, 3372, 4152, 4496, 4671, 5058, 6228, 6744, 7587, 8304, 9342, 10116, 12456, 13488, 15174, 18684, 20232, 24912, 30348, 37368, 40464, 48613, 60696, 74736, 97226, 121392, 145839, 194452, 291678, 388904, 437517, 583356, 777808, 875034, 1166712, 1312551, 1750068, 2333424, 2625102, 3500136, 5250204, 7000272, 10500408, 21000816]

約数ペア:

[(1, 21000816), (2, 10500408), (3, 7000272), (4, 5250204), (6, 3500136), (8, 2625102), (9, 2333424), (12, 1750068), (16, 1312551), (18, 1166712), (24, 875034), (27, 777808), (36, 583356), (48, 437517), (54, 388904), (72, 291678), (108, 194452), (144, 145839), (173, 121392), (216, 97226), (281, 74736), (346, 60696), (432, 48613), (519, 40464), (562, 37368), (692, 30348), (843, 24912), (1038, 20232), (1124, 18684), (1384, 15174), (1557, 13488), (1686, 12456), (2076, 10116), (2248, 9342), (2529, 8304), (2768, 7587), (3114, 6744), (3372, 6228), (4152, 5058), (4496, 4671)]