21451760

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1283}}^1$

素因数の和:1326

約数の個数: 80

約数和(自身を含む): 57317760

約数和(自身を除く): 35866000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1283, 1520, 1672, 2090, 2566, 3344, 4180, 5132, 6415, 8360, 10264, 12830, 14113, 16720, 20528, 24377, 25660, 28226, 48754, 51320, 56452, 70565, 97508, 102640, 112904, 121885, 141130, 195016, 225808, 243770, 268147, 282260, 390032, 487540, 536294, 564520, 975080, 1072588, 1129040, 1340735, 1950160, 2145176, 2681470, 4290352, 5362940, 10725880, 21451760]

約数ペア:

[(1, 21451760), (2, 10725880), (4, 5362940), (5, 4290352), (8, 2681470), (10, 2145176), (11, 1950160), (16, 1340735), (19, 1129040), (20, 1072588), (22, 975080), (38, 564520), (40, 536294), (44, 487540), (55, 390032), (76, 282260), (80, 268147), (88, 243770), (95, 225808), (110, 195016), (152, 141130), (176, 121885), (190, 112904), (209, 102640), (220, 97508), (304, 70565), (380, 56452), (418, 51320), (440, 48754), (760, 28226), (836, 25660), (880, 24377), (1045, 20528), (1283, 16720), (1520, 14113), (1672, 12830), (2090, 10264), (2566, 8360), (3344, 6415), (4180, 5132)]