19900419

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:456

約数の個数: 48

約数和(自身を含む): 34845696

約数和(自身を除く): 14945277

約数列:

[1, 3, 7, 11, 21, 31, 33, 49, 77, 93, 147, 217, 231, 341, 397, 539, 651, 1023, 1191, 1519, 1617, 2387, 2779, 4367, 4557, 7161, 8337, 12307, 13101, 16709, 19453, 30569, 36921, 50127, 58359, 86149, 91707, 135377, 213983, 258447, 406131, 603043, 641949, 947639, 1809129, 2842917, 6633473, 19900419]

約数ペア:

[(1, 19900419), (3, 6633473), (7, 2842917), (11, 1809129), (21, 947639), (31, 641949), (33, 603043), (49, 406131), (77, 258447), (93, 213983), (147, 135377), (217, 91707), (231, 86149), (341, 58359), (397, 50127), (539, 36921), (651, 30569), (1023, 19453), (1191, 16709), (1519, 13101), (1617, 12307), (2387, 8337), (2779, 7161), (4367, 4557)]