19967480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:133

約数の個数: 128

約数和(自身を含む): 53222400

約数和(自身を除く): 33254920

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 43, 47, 52, 65, 76, 86, 94, 95, 104, 130, 152, 172, 188, 190, 215, 235, 247, 260, 344, 376, 380, 430, 470, 494, 520, 559, 611, 760, 817, 860, 893, 940, 988, 1118, 1222, 1235, 1634, 1720, 1786, 1880, 1976, 2021, 2236, 2444, 2470, 2795, 3055, 3268, 3572, 4042, 4085, 4465, 4472, 4888, 4940, 5590, 6110, 6536, 7144, 8084, 8170, 8930, 9880, 10105, 10621, 11180, 11609, 12220, 16168, 16340, 17860, 20210, 21242, 22360, 23218, 24440, 26273, 32680, 35720, 38399, 40420, 42484, 46436, 52546, 53105, 58045, 76798, 80840, 84968, 92872, 105092, 106210, 116090, 131365, 153596, 191995, 210184, 212420, 232180, 262730, 307192, 383990, 424840, 464360, 499187, 525460, 767980, 998374, 1050920, 1535960, 1996748, 2495935, 3993496, 4991870, 9983740, 19967480]

約数ペア:

[(1, 19967480), (2, 9983740), (4, 4991870), (5, 3993496), (8, 2495935), (10, 1996748), (13, 1535960), (19, 1050920), (20, 998374), (26, 767980), (38, 525460), (40, 499187), (43, 464360), (47, 424840), (52, 383990), (65, 307192), (76, 262730), (86, 232180), (94, 212420), (95, 210184), (104, 191995), (130, 153596), (152, 131365), (172, 116090), (188, 106210), (190, 105092), (215, 92872), (235, 84968), (247, 80840), (260, 76798), (344, 58045), (376, 53105), (380, 52546), (430, 46436), (470, 42484), (494, 40420), (520, 38399), (559, 35720), (611, 32680), (760, 26273), (817, 24440), (860, 23218), (893, 22360), (940, 21242), (988, 20210), (1118, 17860), (1222, 16340), (1235, 16168), (1634, 12220), (1720, 11609), (1786, 11180), (1880, 10621), (1976, 10105), (2021, 9880), (2236, 8930), (2444, 8170), (2470, 8084), (2795, 7144), (3055, 6536), (3268, 6110), (3572, 5590), (4042, 4940), (4085, 4888), (4465, 4472)]