21541280

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:190

約数の個数: 96

約数和(自身を含む): 54286848

約数和(自身を除く): 32745568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 43, 62, 80, 86, 101, 124, 155, 160, 172, 202, 215, 248, 310, 344, 404, 430, 496, 505, 620, 688, 808, 860, 992, 1010, 1240, 1333, 1376, 1616, 1720, 2020, 2480, 2666, 3131, 3232, 3440, 4040, 4343, 4960, 5332, 6262, 6665, 6880, 8080, 8686, 10664, 12524, 13330, 15655, 16160, 17372, 21328, 21715, 25048, 26660, 31310, 34744, 42656, 43430, 50096, 53320, 62620, 69488, 86860, 100192, 106640, 125240, 134633, 138976, 173720, 213280, 250480, 269266, 347440, 500960, 538532, 673165, 694880, 1077064, 1346330, 2154128, 2692660, 4308256, 5385320, 10770640, 21541280]

約数ペア:

[(1, 21541280), (2, 10770640), (4, 5385320), (5, 4308256), (8, 2692660), (10, 2154128), (16, 1346330), (20, 1077064), (31, 694880), (32, 673165), (40, 538532), (43, 500960), (62, 347440), (80, 269266), (86, 250480), (101, 213280), (124, 173720), (155, 138976), (160, 134633), (172, 125240), (202, 106640), (215, 100192), (248, 86860), (310, 69488), (344, 62620), (404, 53320), (430, 50096), (496, 43430), (505, 42656), (620, 34744), (688, 31310), (808, 26660), (860, 25048), (992, 21715), (1010, 21328), (1240, 17372), (1333, 16160), (1376, 15655), (1616, 13330), (1720, 12524), (2020, 10664), (2480, 8686), (2666, 8080), (3131, 6880), (3232, 6665), (3440, 6262), (4040, 5332), (4343, 4960)]