21148820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{443}}^1$

素因数の和:501

約数の個数: 96

約数和(自身を含む): 57286656

約数和(自身を除く): 36137836

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 31, 35, 44, 55, 62, 70, 77, 110, 124, 140, 154, 155, 217, 220, 308, 310, 341, 385, 434, 443, 620, 682, 770, 868, 886, 1085, 1364, 1540, 1705, 1772, 2170, 2215, 2387, 3101, 3410, 4340, 4430, 4774, 4873, 6202, 6820, 8860, 9548, 9746, 11935, 12404, 13733, 15505, 19492, 23870, 24365, 27466, 31010, 34111, 47740, 48730, 54932, 62020, 68222, 68665, 96131, 97460, 136444, 137330, 151063, 170555, 192262, 274660, 302126, 341110, 384524, 480655, 604252, 682220, 755315, 961310, 1057441, 1510630, 1922620, 2114882, 3021260, 4229764, 5287205, 10574410, 21148820]

約数ペア:

[(1, 21148820), (2, 10574410), (4, 5287205), (5, 4229764), (7, 3021260), (10, 2114882), (11, 1922620), (14, 1510630), (20, 1057441), (22, 961310), (28, 755315), (31, 682220), (35, 604252), (44, 480655), (55, 384524), (62, 341110), (70, 302126), (77, 274660), (110, 192262), (124, 170555), (140, 151063), (154, 137330), (155, 136444), (217, 97460), (220, 96131), (308, 68665), (310, 68222), (341, 62020), (385, 54932), (434, 48730), (443, 47740), (620, 34111), (682, 31010), (770, 27466), (868, 24365), (886, 23870), (1085, 19492), (1364, 15505), (1540, 13733), (1705, 12404), (1772, 11935), (2170, 9746), (2215, 9548), (2387, 8860), (3101, 6820), (3410, 6202), (4340, 4873), (4430, 4774)]