21236960

素因数分解:

$2^5\times 5^1\times {\mathrm{331}}^1\times {\mathrm{401}}^1$

素因数の和:747

約数の個数: 48

約数和(自身を含む): 50449392

約数和(自身を除く): 29212432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 331, 401, 662, 802, 1324, 1604, 1655, 2005, 2648, 3208, 3310, 4010, 5296, 6416, 6620, 8020, 10592, 12832, 13240, 16040, 26480, 32080, 52960, 64160, 132731, 265462, 530924, 663655, 1061848, 1327310, 2123696, 2654620, 4247392, 5309240, 10618480, 21236960]

約数ペア:

[(1, 21236960), (2, 10618480), (4, 5309240), (5, 4247392), (8, 2654620), (10, 2123696), (16, 1327310), (20, 1061848), (32, 663655), (40, 530924), (80, 265462), (160, 132731), (331, 64160), (401, 52960), (662, 32080), (802, 26480), (1324, 16040), (1604, 13240), (1655, 12832), (2005, 10592), (2648, 8020), (3208, 6620), (3310, 6416), (4010, 5296)]