20048320

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:138

約数の個数: 112

約数和(自身を含む): 51499008

約数和(自身を除く): 31450688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 43, 47, 62, 64, 80, 86, 94, 124, 155, 160, 172, 188, 215, 235, 248, 310, 320, 344, 376, 430, 470, 496, 620, 688, 752, 860, 940, 992, 1240, 1333, 1376, 1457, 1504, 1720, 1880, 1984, 2021, 2480, 2666, 2752, 2914, 3008, 3440, 3760, 4042, 4960, 5332, 5828, 6665, 6880, 7285, 7520, 8084, 9920, 10105, 10664, 11656, 13330, 13760, 14570, 15040, 16168, 20210, 21328, 23312, 26660, 29140, 32336, 40420, 42656, 46624, 53320, 58280, 62651, 64672, 80840, 85312, 93248, 106640, 116560, 125302, 129344, 161680, 213280, 233120, 250604, 313255, 323360, 426560, 466240, 501208, 626510, 646720, 1002416, 1253020, 2004832, 2506040, 4009664, 5012080, 10024160, 20048320]

約数ペア:

[(1, 20048320), (2, 10024160), (4, 5012080), (5, 4009664), (8, 2506040), (10, 2004832), (16, 1253020), (20, 1002416), (31, 646720), (32, 626510), (40, 501208), (43, 466240), (47, 426560), (62, 323360), (64, 313255), (80, 250604), (86, 233120), (94, 213280), (124, 161680), (155, 129344), (160, 125302), (172, 116560), (188, 106640), (215, 93248), (235, 85312), (248, 80840), (310, 64672), (320, 62651), (344, 58280), (376, 53320), (430, 46624), (470, 42656), (496, 40420), (620, 32336), (688, 29140), (752, 26660), (860, 23312), (940, 21328), (992, 20210), (1240, 16168), (1333, 15040), (1376, 14570), (1457, 13760), (1504, 13330), (1720, 11656), (1880, 10664), (1984, 10105), (2021, 9920), (2480, 8084), (2666, 7520), (2752, 7285), (2914, 6880), (3008, 6665), (3440, 5828), (3760, 5332), (4042, 4960)]