15120520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 35640000

約数和(自身を除く): 20519480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 59, 86, 118, 149, 172, 215, 236, 295, 298, 344, 430, 472, 590, 596, 745, 860, 1180, 1192, 1490, 1720, 2360, 2537, 2980, 5074, 5960, 6407, 8791, 10148, 12685, 12814, 17582, 20296, 25370, 25628, 32035, 35164, 43955, 50740, 51256, 64070, 70328, 87910, 101480, 128140, 175820, 256280, 351640, 378013, 756026, 1512052, 1890065, 3024104, 3780130, 7560260, 15120520]

約数ペア:

[(1, 15120520), (2, 7560260), (4, 3780130), (5, 3024104), (8, 1890065), (10, 1512052), (20, 756026), (40, 378013), (43, 351640), (59, 256280), (86, 175820), (118, 128140), (149, 101480), (172, 87910), (215, 70328), (236, 64070), (295, 51256), (298, 50740), (344, 43955), (430, 35164), (472, 32035), (590, 25628), (596, 25370), (745, 20296), (860, 17582), (1180, 12814), (1192, 12685), (1490, 10148), (1720, 8791), (2360, 6407), (2537, 5960), (2980, 5074)]