217552840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1\times {\mathrm{547}}^1$

素因数の和:782

約数の個数: 64

約数和(自身を含む): 501485760

約数和(自身を除く): 283932920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 163, 244, 305, 326, 488, 547, 610, 652, 815, 1094, 1220, 1304, 1630, 2188, 2440, 2735, 3260, 4376, 5470, 6520, 9943, 10940, 19886, 21880, 33367, 39772, 49715, 66734, 79544, 89161, 99430, 133468, 166835, 178322, 198860, 266936, 333670, 356644, 397720, 445805, 667340, 713288, 891610, 1334680, 1783220, 3566440, 5438821, 10877642, 21755284, 27194105, 43510568, 54388210, 108776420, 217552840]

約数ペア:

[(1, 217552840), (2, 108776420), (4, 54388210), (5, 43510568), (8, 27194105), (10, 21755284), (20, 10877642), (40, 5438821), (61, 3566440), (122, 1783220), (163, 1334680), (244, 891610), (305, 713288), (326, 667340), (488, 445805), (547, 397720), (610, 356644), (652, 333670), (815, 266936), (1094, 198860), (1220, 178322), (1304, 166835), (1630, 133468), (2188, 99430), (2440, 89161), (2735, 79544), (3260, 66734), (4376, 49715), (5470, 39772), (6520, 33367), (9943, 21880), (10940, 19886)]