20485458

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:276

約数の個数: 96

約数和(自身を含む): 54912000

約数和(自身を除く): 34426542

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 19, 21, 38, 42, 43, 57, 63, 86, 114, 126, 129, 133, 171, 199, 258, 266, 301, 342, 387, 398, 399, 597, 602, 774, 798, 817, 903, 1194, 1197, 1393, 1634, 1791, 1806, 2394, 2451, 2709, 2786, 3582, 3781, 4179, 4902, 5418, 5719, 7353, 7562, 8358, 8557, 11343, 11438, 12537, 14706, 17114, 17157, 22686, 25074, 25671, 26467, 34029, 34314, 51342, 51471, 52934, 59899, 68058, 77013, 79401, 102942, 119798, 154026, 158802, 162583, 179697, 238203, 325166, 359394, 476406, 487749, 539091, 975498, 1078182, 1138081, 1463247, 2276162, 2926494, 3414243, 6828486, 10242729, 20485458]

約数ペア:

[(1, 20485458), (2, 10242729), (3, 6828486), (6, 3414243), (7, 2926494), (9, 2276162), (14, 1463247), (18, 1138081), (19, 1078182), (21, 975498), (38, 539091), (42, 487749), (43, 476406), (57, 359394), (63, 325166), (86, 238203), (114, 179697), (126, 162583), (129, 158802), (133, 154026), (171, 119798), (199, 102942), (258, 79401), (266, 77013), (301, 68058), (342, 59899), (387, 52934), (398, 51471), (399, 51342), (597, 34314), (602, 34029), (774, 26467), (798, 25671), (817, 25074), (903, 22686), (1194, 17157), (1197, 17114), (1393, 14706), (1634, 12537), (1791, 11438), (1806, 11343), (2394, 8557), (2451, 8358), (2709, 7562), (2786, 7353), (3582, 5719), (3781, 5418), (4179, 4902)]