21378156

素因数分解:

$2^2\times 3^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{541}}^1$

素因数の和:674

約数の個数: 48

約数和(自身を含む): 51901920

約数和(自身を除く): 30523764

約数列:

[1, 2, 3, 4, 6, 12, 37, 74, 89, 111, 148, 178, 222, 267, 356, 444, 534, 541, 1068, 1082, 1623, 2164, 3246, 3293, 6492, 6586, 9879, 13172, 19758, 20017, 39516, 40034, 48149, 60051, 80068, 96298, 120102, 144447, 192596, 240204, 288894, 577788, 1781513, 3563026, 5344539, 7126052, 10689078, 21378156]

約数ペア:

[(1, 21378156), (2, 10689078), (3, 7126052), (4, 5344539), (6, 3563026), (12, 1781513), (37, 577788), (74, 288894), (89, 240204), (111, 192596), (148, 144447), (178, 120102), (222, 96298), (267, 80068), (356, 60051), (444, 48149), (534, 40034), (541, 39516), (1068, 20017), (1082, 19758), (1623, 13172), (2164, 9879), (3246, 6586), (3293, 6492)]