21999208

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{503}}^1$

素因数の和:598

約数の個数: 64

約数和(自身を含む): 52254720

約数和(自身を除く): 30255512

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 71, 77, 88, 142, 154, 284, 308, 497, 503, 568, 616, 781, 994, 1006, 1562, 1988, 2012, 3124, 3521, 3976, 4024, 5467, 5533, 6248, 7042, 10934, 11066, 14084, 21868, 22132, 28168, 35713, 38731, 43736, 44264, 71426, 77462, 142852, 154924, 249991, 285704, 309848, 392843, 499982, 785686, 999964, 1571372, 1999928, 2749901, 3142744, 5499802, 10999604, 21999208]

約数ペア:

[(1, 21999208), (2, 10999604), (4, 5499802), (7, 3142744), (8, 2749901), (11, 1999928), (14, 1571372), (22, 999964), (28, 785686), (44, 499982), (56, 392843), (71, 309848), (77, 285704), (88, 249991), (142, 154924), (154, 142852), (284, 77462), (308, 71426), (497, 44264), (503, 43736), (568, 38731), (616, 35713), (781, 28168), (994, 22132), (1006, 21868), (1562, 14084), (1988, 11066), (2012, 10934), (3124, 7042), (3521, 6248), (3976, 5533), (4024, 5467)]