21165808

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{307}}^1$

素因数の和:485

約数の個数: 40

約数和(自身を含む): 42775040

約数和(自身を除く): 21609232

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 139, 248, 278, 307, 496, 556, 614, 1112, 1228, 2224, 2456, 4309, 4912, 8618, 9517, 17236, 19034, 34472, 38068, 42673, 68944, 76136, 85346, 152272, 170692, 341384, 682768, 1322863, 2645726, 5291452, 10582904, 21165808]

約数ペア:

[(1, 21165808), (2, 10582904), (4, 5291452), (8, 2645726), (16, 1322863), (31, 682768), (62, 341384), (124, 170692), (139, 152272), (248, 85346), (278, 76136), (307, 68944), (496, 42673), (556, 38068), (614, 34472), (1112, 19034), (1228, 17236), (2224, 9517), (2456, 8618), (4309, 4912)]