20451340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{661}}^1$

素因数の和:707

約数の個数: 96

約数和(自身を含む): 56052864

約数和(自身を除く): 35601524

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 17, 20, 26, 28, 34, 35, 52, 65, 68, 70, 85, 91, 119, 130, 140, 170, 182, 221, 238, 260, 340, 364, 442, 455, 476, 595, 661, 884, 910, 1105, 1190, 1322, 1547, 1820, 2210, 2380, 2644, 3094, 3305, 4420, 4627, 6188, 6610, 7735, 8593, 9254, 11237, 13220, 15470, 17186, 18508, 22474, 23135, 30940, 34372, 42965, 44948, 46270, 56185, 60151, 78659, 85930, 92540, 112370, 120302, 146081, 157318, 171860, 224740, 240604, 292162, 300755, 314636, 393295, 584324, 601510, 730405, 786590, 1022567, 1203020, 1460810, 1573180, 2045134, 2921620, 4090268, 5112835, 10225670, 20451340]

約数ペア:

[(1, 20451340), (2, 10225670), (4, 5112835), (5, 4090268), (7, 2921620), (10, 2045134), (13, 1573180), (14, 1460810), (17, 1203020), (20, 1022567), (26, 786590), (28, 730405), (34, 601510), (35, 584324), (52, 393295), (65, 314636), (68, 300755), (70, 292162), (85, 240604), (91, 224740), (119, 171860), (130, 157318), (140, 146081), (170, 120302), (182, 112370), (221, 92540), (238, 85930), (260, 78659), (340, 60151), (364, 56185), (442, 46270), (455, 44948), (476, 42965), (595, 34372), (661, 30940), (884, 23135), (910, 22474), (1105, 18508), (1190, 17186), (1322, 15470), (1547, 13220), (1820, 11237), (2210, 9254), (2380, 8593), (2644, 7735), (3094, 6610), (3305, 6188), (4420, 4627)]