21052850

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:700

約数の個数: 72

約数和(自身を含む): 49129668

約数和(自身を除く): 28076818

約数列:

[1, 2, 5, 7, 10, 13, 14, 25, 26, 35, 49, 50, 65, 70, 91, 98, 130, 175, 182, 245, 325, 350, 455, 490, 637, 650, 661, 910, 1225, 1274, 1322, 2275, 2450, 3185, 3305, 4550, 4627, 6370, 6610, 8593, 9254, 15925, 16525, 17186, 23135, 31850, 32389, 33050, 42965, 46270, 60151, 64778, 85930, 115675, 120302, 161945, 214825, 231350, 300755, 323890, 421057, 429650, 601510, 809725, 842114, 1503775, 1619450, 2105285, 3007550, 4210570, 10526425, 21052850]

約数ペア:

[(1, 21052850), (2, 10526425), (5, 4210570), (7, 3007550), (10, 2105285), (13, 1619450), (14, 1503775), (25, 842114), (26, 809725), (35, 601510), (49, 429650), (50, 421057), (65, 323890), (70, 300755), (91, 231350), (98, 214825), (130, 161945), (175, 120302), (182, 115675), (245, 85930), (325, 64778), (350, 60151), (455, 46270), (490, 42965), (637, 33050), (650, 32389), (661, 31850), (910, 23135), (1225, 17186), (1274, 16525), (1322, 15925), (2275, 9254), (2450, 8593), (3185, 6610), (3305, 6370), (4550, 4627)]