21887860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{821}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 48609792

約数和(自身を除く): 26721932

約数列:

[1, 2, 4, 5, 10, 20, 31, 43, 62, 86, 124, 155, 172, 215, 310, 430, 620, 821, 860, 1333, 1642, 2666, 3284, 4105, 5332, 6665, 8210, 13330, 16420, 25451, 26660, 35303, 50902, 70606, 101804, 127255, 141212, 176515, 254510, 353030, 509020, 706060, 1094393, 2188786, 4377572, 5471965, 10943930, 21887860]

約数ペア:

[(1, 21887860), (2, 10943930), (4, 5471965), (5, 4377572), (10, 2188786), (20, 1094393), (31, 706060), (43, 509020), (62, 353030), (86, 254510), (124, 176515), (155, 141212), (172, 127255), (215, 101804), (310, 70606), (430, 50902), (620, 35303), (821, 26660), (860, 25451), (1333, 16420), (1642, 13330), (2666, 8210), (3284, 6665), (4105, 5332)]