20197580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{593}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 46103904

約数和(自身を除く): 25906324

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 524, 593, 655, 1186, 1310, 1703, 2372, 2620, 2965, 3406, 5930, 6812, 7709, 8515, 11860, 15418, 17030, 30836, 34060, 38545, 77090, 77683, 154180, 155366, 310732, 388415, 776830, 1009879, 1553660, 2019758, 4039516, 5049395, 10098790, 20197580]

約数ペア:

[(1, 20197580), (2, 10098790), (4, 5049395), (5, 4039516), (10, 2019758), (13, 1553660), (20, 1009879), (26, 776830), (52, 388415), (65, 310732), (130, 155366), (131, 154180), (260, 77683), (262, 77090), (524, 38545), (593, 34060), (655, 30836), (1186, 17030), (1310, 15418), (1703, 11860), (2372, 8515), (2620, 7709), (2965, 6812), (3406, 5930)]