19870480

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:201

約数の個数: 120

約数和(自身を含む): 55596888

約数和(自身を除く): 35726408

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 49, 56, 70, 74, 80, 98, 112, 137, 140, 148, 185, 196, 245, 259, 274, 280, 296, 370, 392, 490, 518, 548, 560, 592, 685, 740, 784, 959, 980, 1036, 1096, 1295, 1370, 1480, 1813, 1918, 1960, 2072, 2192, 2590, 2740, 2960, 3626, 3836, 3920, 4144, 4795, 5069, 5180, 5480, 6713, 7252, 7672, 9065, 9590, 10138, 10360, 10960, 13426, 14504, 15344, 18130, 19180, 20276, 20720, 25345, 26852, 29008, 33565, 35483, 36260, 38360, 40552, 50690, 53704, 67130, 70966, 72520, 76720, 81104, 101380, 107408, 134260, 141932, 145040, 177415, 202760, 248381, 268520, 283864, 354830, 405520, 496762, 537040, 567728, 709660, 993524, 1241905, 1419320, 1987048, 2483810, 2838640, 3974096, 4967620, 9935240, 19870480]

約数ペア:

[(1, 19870480), (2, 9935240), (4, 4967620), (5, 3974096), (7, 2838640), (8, 2483810), (10, 1987048), (14, 1419320), (16, 1241905), (20, 993524), (28, 709660), (35, 567728), (37, 537040), (40, 496762), (49, 405520), (56, 354830), (70, 283864), (74, 268520), (80, 248381), (98, 202760), (112, 177415), (137, 145040), (140, 141932), (148, 134260), (185, 107408), (196, 101380), (245, 81104), (259, 76720), (274, 72520), (280, 70966), (296, 67130), (370, 53704), (392, 50690), (490, 40552), (518, 38360), (548, 36260), (560, 35483), (592, 33565), (685, 29008), (740, 26852), (784, 25345), (959, 20720), (980, 20276), (1036, 19180), (1096, 18130), (1295, 15344), (1370, 14504), (1480, 13426), (1813, 10960), (1918, 10360), (1960, 10138), (2072, 9590), (2192, 9065), (2590, 7672), (2740, 7252), (2960, 6713), (3626, 5480), (3836, 5180), (3920, 5069), (4144, 4795)]