20931560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40253}}^1$

素因数の和:40277

約数の個数: 32

約数和(自身を含む): 50720040

約数和(自身を除く): 29788480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40253, 80506, 161012, 201265, 322024, 402530, 523289, 805060, 1046578, 1610120, 2093156, 2616445, 4186312, 5232890, 10465780, 20931560]

約数ペア:

[(1, 20931560), (2, 10465780), (4, 5232890), (5, 4186312), (8, 2616445), (10, 2093156), (13, 1610120), (20, 1046578), (26, 805060), (40, 523289), (52, 402530), (65, 322024), (104, 201265), (130, 161012), (260, 80506), (520, 40253)]