19756720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{199}}^1$

素因数の和:302

約数の個数: 80

約数和(自身を含む): 49550400

約数和(自身を除く): 29793680

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 73, 80, 85, 136, 146, 170, 199, 272, 292, 340, 365, 398, 584, 680, 730, 796, 995, 1168, 1241, 1360, 1460, 1592, 1990, 2482, 2920, 3184, 3383, 3980, 4964, 5840, 6205, 6766, 7960, 9928, 12410, 13532, 14527, 15920, 16915, 19856, 24820, 27064, 29054, 33830, 49640, 54128, 58108, 67660, 72635, 99280, 116216, 135320, 145270, 232432, 246959, 270640, 290540, 493918, 581080, 987836, 1162160, 1234795, 1975672, 2469590, 3951344, 4939180, 9878360, 19756720]

約数ペア:

[(1, 19756720), (2, 9878360), (4, 4939180), (5, 3951344), (8, 2469590), (10, 1975672), (16, 1234795), (17, 1162160), (20, 987836), (34, 581080), (40, 493918), (68, 290540), (73, 270640), (80, 246959), (85, 232432), (136, 145270), (146, 135320), (170, 116216), (199, 99280), (272, 72635), (292, 67660), (340, 58108), (365, 54128), (398, 49640), (584, 33830), (680, 29054), (730, 27064), (796, 24820), (995, 19856), (1168, 16915), (1241, 15920), (1360, 14527), (1460, 13532), (1592, 12410), (1990, 9928), (2482, 7960), (2920, 6766), (3184, 6205), (3383, 5840), (3980, 4964)]