19948880

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{727}}^1$

素因数の和:761

約数の個数: 80

約数和(自身を含む): 54163200

約数和(自身を除く): 34214320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 727, 784, 980, 1372, 1454, 1715, 1960, 2744, 2908, 3430, 3635, 3920, 5089, 5488, 5816, 6860, 7270, 10178, 11632, 13720, 14540, 20356, 25445, 27440, 29080, 35623, 40712, 50890, 58160, 71246, 81424, 101780, 142492, 178115, 203560, 249361, 284984, 356230, 407120, 498722, 569968, 712460, 997444, 1246805, 1424920, 1994888, 2493610, 2849840, 3989776, 4987220, 9974440, 19948880]

約数ペア:

[(1, 19948880), (2, 9974440), (4, 4987220), (5, 3989776), (7, 2849840), (8, 2493610), (10, 1994888), (14, 1424920), (16, 1246805), (20, 997444), (28, 712460), (35, 569968), (40, 498722), (49, 407120), (56, 356230), (70, 284984), (80, 249361), (98, 203560), (112, 178115), (140, 142492), (196, 101780), (245, 81424), (280, 71246), (343, 58160), (392, 50890), (490, 40712), (560, 35623), (686, 29080), (727, 27440), (784, 25445), (980, 20356), (1372, 14540), (1454, 13720), (1715, 11632), (1960, 10178), (2744, 7270), (2908, 6860), (3430, 5816), (3635, 5488), (3920, 5089)]