21752668

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 47401200

約数和(自身を除く): 25648532

約数列:

[1, 2, 4, 7, 14, 28, 29, 43, 49, 58, 86, 89, 98, 116, 172, 178, 196, 203, 301, 356, 406, 602, 623, 812, 1204, 1246, 1247, 1421, 2107, 2492, 2494, 2581, 2842, 3827, 4214, 4361, 4988, 5162, 5684, 7654, 8428, 8722, 8729, 10324, 15308, 17444, 17458, 18067, 26789, 34916, 36134, 53578, 61103, 72268, 107156, 110983, 122206, 126469, 187523, 221966, 244412, 252938, 375046, 443932, 505876, 750092, 776881, 1553762, 3107524, 5438167, 10876334, 21752668]

約数ペア:

[(1, 21752668), (2, 10876334), (4, 5438167), (7, 3107524), (14, 1553762), (28, 776881), (29, 750092), (43, 505876), (49, 443932), (58, 375046), (86, 252938), (89, 244412), (98, 221966), (116, 187523), (172, 126469), (178, 122206), (196, 110983), (203, 107156), (301, 72268), (356, 61103), (406, 53578), (602, 36134), (623, 34916), (812, 26789), (1204, 18067), (1246, 17458), (1247, 17444), (1421, 15308), (2107, 10324), (2492, 8729), (2494, 8722), (2581, 8428), (2842, 7654), (3827, 5684), (4214, 5162), (4361, 4988)]