214920520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1\times {\mathrm{491}}^1$

素因数の和:886

約数の個数: 64

約数和(自身を含む): 501603840

約数和(自身を除く): 286683320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 353, 491, 620, 706, 982, 1240, 1412, 1765, 1964, 2455, 2824, 3530, 3928, 4910, 7060, 9820, 10943, 14120, 15221, 19640, 21886, 30442, 43772, 54715, 60884, 76105, 87544, 109430, 121768, 152210, 173323, 218860, 304420, 346646, 437720, 608840, 693292, 866615, 1386584, 1733230, 3466460, 5373013, 6932920, 10746026, 21492052, 26865065, 42984104, 53730130, 107460260, 214920520]

約数ペア:

[(1, 214920520), (2, 107460260), (4, 53730130), (5, 42984104), (8, 26865065), (10, 21492052), (20, 10746026), (31, 6932920), (40, 5373013), (62, 3466460), (124, 1733230), (155, 1386584), (248, 866615), (310, 693292), (353, 608840), (491, 437720), (620, 346646), (706, 304420), (982, 218860), (1240, 173323), (1412, 152210), (1765, 121768), (1964, 109430), (2455, 87544), (2824, 76105), (3530, 60884), (3928, 54715), (4910, 43772), (7060, 30442), (9820, 21886), (10943, 19640), (14120, 15221)]