19882720

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:129

約数の個数: 144

約数和(自身を含む): 56306880

約数和(自身を除く): 36424160

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 32, 40, 44, 52, 55, 65, 79, 80, 88, 104, 110, 121, 130, 143, 158, 160, 176, 208, 220, 242, 260, 286, 316, 352, 395, 416, 440, 484, 520, 572, 605, 632, 715, 790, 869, 880, 968, 1027, 1040, 1144, 1210, 1264, 1430, 1573, 1580, 1738, 1760, 1936, 2054, 2080, 2288, 2420, 2528, 2860, 3146, 3160, 3476, 3872, 4108, 4345, 4576, 4840, 5135, 5720, 6292, 6320, 6952, 7865, 8216, 8690, 9559, 9680, 10270, 11297, 11440, 12584, 12640, 13904, 15730, 16432, 17380, 19118, 19360, 20540, 22594, 22880, 25168, 27808, 31460, 32864, 34760, 38236, 41080, 45188, 47795, 50336, 56485, 62920, 69520, 76472, 82160, 90376, 95590, 112970, 124267, 125840, 139040, 152944, 164320, 180752, 191180, 225940, 248534, 251680, 305888, 361504, 382360, 451880, 497068, 621335, 764720, 903760, 994136, 1242670, 1529440, 1807520, 1988272, 2485340, 3976544, 4970680, 9941360, 19882720]

約数ペア:

[(1, 19882720), (2, 9941360), (4, 4970680), (5, 3976544), (8, 2485340), (10, 1988272), (11, 1807520), (13, 1529440), (16, 1242670), (20, 994136), (22, 903760), (26, 764720), (32, 621335), (40, 497068), (44, 451880), (52, 382360), (55, 361504), (65, 305888), (79, 251680), (80, 248534), (88, 225940), (104, 191180), (110, 180752), (121, 164320), (130, 152944), (143, 139040), (158, 125840), (160, 124267), (176, 112970), (208, 95590), (220, 90376), (242, 82160), (260, 76472), (286, 69520), (316, 62920), (352, 56485), (395, 50336), (416, 47795), (440, 45188), (484, 41080), (520, 38236), (572, 34760), (605, 32864), (632, 31460), (715, 27808), (790, 25168), (869, 22880), (880, 22594), (968, 20540), (1027, 19360), (1040, 19118), (1144, 17380), (1210, 16432), (1264, 15730), (1430, 13904), (1573, 12640), (1580, 12584), (1738, 11440), (1760, 11297), (1936, 10270), (2054, 9680), (2080, 9559), (2288, 8690), (2420, 8216), (2528, 7865), (2860, 6952), (3146, 6320), (3160, 6292), (3476, 5720), (3872, 5135), (4108, 4840), (4345, 4576)]