201816520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{449}}^1\times {\mathrm{661}}^1$

素因数の和:1138

約数の個数: 64

約数和(自身を含む): 482598000

約数和(自身を除く): 280781480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 449, 661, 680, 898, 1322, 1796, 2245, 2644, 3305, 3592, 4490, 5288, 6610, 7633, 8980, 11237, 13220, 15266, 17960, 22474, 26440, 30532, 38165, 44948, 56185, 61064, 76330, 89896, 112370, 152660, 224740, 296789, 305320, 449480, 593578, 1187156, 1483945, 2374312, 2967890, 5045413, 5935780, 10090826, 11871560, 20181652, 25227065, 40363304, 50454130, 100908260, 201816520]

約数ペア:

[(1, 201816520), (2, 100908260), (4, 50454130), (5, 40363304), (8, 25227065), (10, 20181652), (17, 11871560), (20, 10090826), (34, 5935780), (40, 5045413), (68, 2967890), (85, 2374312), (136, 1483945), (170, 1187156), (340, 593578), (449, 449480), (661, 305320), (680, 296789), (898, 224740), (1322, 152660), (1796, 112370), (2245, 89896), (2644, 76330), (3305, 61064), (3592, 56185), (4490, 44948), (5288, 38165), (6610, 30532), (7633, 26440), (8980, 22474), (11237, 17960), (13220, 15266)]