20912889291

素因数分解:

$3^1\times 7^2\times {\mathrm{397}}^1\times {\mathrm{358349}}^1$

素因数の和:358763

約数の個数: 24

約数和(自身を含む): 32518112400

約数和(自身を除く): 11605223109

約数列:

[1, 3, 7, 21, 49, 147, 397, 1191, 2779, 8337, 19453, 58359, 358349, 1075047, 2508443, 7525329, 17559101, 52677303, 142264553, 426793659, 995851871, 2987555613, 6970963097, 20912889291]

約数ペア:

[(1, 20912889291), (3, 6970963097), (7, 2987555613), (21, 995851871), (49, 426793659), (147, 142264553), (397, 52677303), (1191, 17559101), (2779, 7525329), (8337, 2508443), (19453, 1075047), (58359, 358349)]