21004048

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{100981}}^1$

素因数の和:101002

約数の個数: 20

約数和(自身を含む): 43826188

約数和(自身を除く): 22822140

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 100981, 201962, 403924, 807848, 1312753, 1615696, 2625506, 5251012, 10502024, 21004048]

約数ペア:

[(1, 21004048), (2, 10502024), (4, 5251012), (8, 2625506), (13, 1615696), (16, 1312753), (26, 807848), (52, 403924), (104, 201962), (208, 100981)]