20728260

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16451}}^1$

素因数の和:16473

約数の個数: 72

約数和(自身を含む): 71862336

約数和(自身を除く): 51134076

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16451, 32902, 49353, 65804, 82255, 98706, 115157, 148059, 164510, 197412, 230314, 246765, 296118, 329020, 345471, 460628, 493530, 575785, 592236, 690942, 740295, 987060, 1036413, 1151570, 1381884, 1480590, 1727355, 2072826, 2303140, 2961180, 3454710, 4145652, 5182065, 6909420, 10364130, 20728260]

約数ペア:

[(1, 20728260), (2, 10364130), (3, 6909420), (4, 5182065), (5, 4145652), (6, 3454710), (7, 2961180), (9, 2303140), (10, 2072826), (12, 1727355), (14, 1480590), (15, 1381884), (18, 1151570), (20, 1036413), (21, 987060), (28, 740295), (30, 690942), (35, 592236), (36, 575785), (42, 493530), (45, 460628), (60, 345471), (63, 329020), (70, 296118), (84, 246765), (90, 230314), (105, 197412), (126, 164510), (140, 148059), (180, 115157), (210, 98706), (252, 82255), (315, 65804), (420, 49353), (630, 32902), (1260, 16451)]