399665920

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{18367}}^1$

素因数の和:18405

約数の個数: 72

約数和(自身を含む): 1013693184

約数和(自身を除く): 614027264

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 1088, 1280, 1360, 2176, 2720, 4352, 5440, 10880, 18367, 21760, 36734, 73468, 91835, 146936, 183670, 293872, 312239, 367340, 587744, 624478, 734680, 1175488, 1248956, 1469360, 1561195, 2350976, 2497912, 2938720, 3122390, 4701952, 4995824, 5877440, 6244780, 9991648, 11754880, 12489560, 19983296, 23509760, 24979120, 39966592, 49958240, 79933184, 99916480, 199832960, 399665920]

約数ペア:

[(1, 399665920), (2, 199832960), (4, 99916480), (5, 79933184), (8, 49958240), (10, 39966592), (16, 24979120), (17, 23509760), (20, 19983296), (32, 12489560), (34, 11754880), (40, 9991648), (64, 6244780), (68, 5877440), (80, 4995824), (85, 4701952), (128, 3122390), (136, 2938720), (160, 2497912), (170, 2350976), (256, 1561195), (272, 1469360), (320, 1248956), (340, 1175488), (544, 734680), (640, 624478), (680, 587744), (1088, 367340), (1280, 312239), (1360, 293872), (2176, 183670), (2720, 146936), (4352, 91835), (5440, 73468), (10880, 36734), (18367, 21760)]