640139920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{2237}}^1$

素因数の和:2337

約数の個数: 120

約数和(自身を含む): 1755818424

約数和(自身を除く): 1115678504

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 73, 80, 98, 112, 140, 146, 196, 245, 280, 292, 365, 392, 490, 511, 560, 584, 730, 784, 980, 1022, 1168, 1460, 1960, 2044, 2237, 2555, 2920, 3577, 3920, 4088, 4474, 5110, 5840, 7154, 8176, 8948, 10220, 11185, 14308, 15659, 17885, 17896, 20440, 22370, 28616, 31318, 35770, 35792, 40880, 44740, 57232, 62636, 71540, 78295, 89480, 109613, 125272, 143080, 156590, 163301, 178960, 219226, 250544, 286160, 313180, 326602, 438452, 548065, 626360, 653204, 816505, 876904, 1096130, 1143107, 1252720, 1306408, 1633010, 1753808, 2192260, 2286214, 2612816, 3266020, 4384520, 4572428, 5715535, 6532040, 8001749, 8769040, 9144856, 11431070, 13064080, 16003498, 18289712, 22862140, 32006996, 40008745, 45724280, 64013992, 80017490, 91448560, 128027984, 160034980, 320069960, 640139920]

約数ペア:

[(1, 640139920), (2, 320069960), (4, 160034980), (5, 128027984), (7, 91448560), (8, 80017490), (10, 64013992), (14, 45724280), (16, 40008745), (20, 32006996), (28, 22862140), (35, 18289712), (40, 16003498), (49, 13064080), (56, 11431070), (70, 9144856), (73, 8769040), (80, 8001749), (98, 6532040), (112, 5715535), (140, 4572428), (146, 4384520), (196, 3266020), (245, 2612816), (280, 2286214), (292, 2192260), (365, 1753808), (392, 1633010), (490, 1306408), (511, 1252720), (560, 1143107), (584, 1096130), (730, 876904), (784, 816505), (980, 653204), (1022, 626360), (1168, 548065), (1460, 438452), (1960, 326602), (2044, 313180), (2237, 286160), (2555, 250544), (2920, 219226), (3577, 178960), (3920, 163301), (4088, 156590), (4474, 143080), (5110, 125272), (5840, 109613), (7154, 89480), (8176, 78295), (8948, 71540), (10220, 62636), (11185, 57232), (14308, 44740), (15659, 40880), (17885, 35792), (17896, 35770), (20440, 31318), (22370, 28616)]