21628100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 51330048

約数和(自身を除く): 29701948

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 127, 130, 131, 254, 260, 262, 325, 508, 524, 635, 650, 655, 1270, 1300, 1310, 1651, 1703, 2540, 2620, 3175, 3275, 3302, 3406, 6350, 6550, 6604, 6812, 8255, 8515, 12700, 13100, 16510, 16637, 17030, 33020, 33274, 34060, 41275, 42575, 66548, 82550, 83185, 85150, 165100, 166370, 170300, 216281, 332740, 415925, 432562, 831850, 865124, 1081405, 1663700, 2162810, 4325620, 5407025, 10814050, 21628100]

約数ペア:

[(1, 21628100), (2, 10814050), (4, 5407025), (5, 4325620), (10, 2162810), (13, 1663700), (20, 1081405), (25, 865124), (26, 831850), (50, 432562), (52, 415925), (65, 332740), (100, 216281), (127, 170300), (130, 166370), (131, 165100), (254, 85150), (260, 83185), (262, 82550), (325, 66548), (508, 42575), (524, 41275), (635, 34060), (650, 33274), (655, 33020), (1270, 17030), (1300, 16637), (1310, 16510), (1651, 13100), (1703, 12700), (2540, 8515), (2620, 8255), (3175, 6812), (3275, 6604), (3302, 6550), (3406, 6350)]