20801228

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 43110144

約数和(自身を除く): 22308916

約数列:

[1, 2, 4, 7, 14, 28, 53, 106, 107, 131, 212, 214, 262, 371, 428, 524, 742, 749, 917, 1484, 1498, 1834, 2996, 3668, 5671, 6943, 11342, 13886, 14017, 22684, 27772, 28034, 39697, 48601, 56068, 79394, 97202, 98119, 158788, 194404, 196238, 392476, 742901, 1485802, 2971604, 5200307, 10400614, 20801228]

約数ペア:

[(1, 20801228), (2, 10400614), (4, 5200307), (7, 2971604), (14, 1485802), (28, 742901), (53, 392476), (106, 196238), (107, 194404), (131, 158788), (212, 98119), (214, 97202), (262, 79394), (371, 56068), (428, 48601), (524, 39697), (742, 28034), (749, 27772), (917, 22684), (1484, 14017), (1498, 13886), (1834, 11342), (2996, 6943), (3668, 5671)]