20521976

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:192

約数の個数: 64

約数和(自身を含む): 43092000

約数和(自身を除く): 22570024

約数列:

[1, 2, 4, 8, 19, 37, 38, 41, 74, 76, 82, 89, 148, 152, 164, 178, 296, 328, 356, 703, 712, 779, 1406, 1517, 1558, 1691, 2812, 3034, 3116, 3293, 3382, 3649, 5624, 6068, 6232, 6586, 6764, 7298, 12136, 13172, 13528, 14596, 26344, 28823, 29192, 57646, 62567, 69331, 115292, 125134, 135013, 138662, 230584, 250268, 270026, 277324, 500536, 540052, 554648, 1080104, 2565247, 5130494, 10260988, 20521976]

約数ペア:

[(1, 20521976), (2, 10260988), (4, 5130494), (8, 2565247), (19, 1080104), (37, 554648), (38, 540052), (41, 500536), (74, 277324), (76, 270026), (82, 250268), (89, 230584), (148, 138662), (152, 135013), (164, 125134), (178, 115292), (296, 69331), (328, 62567), (356, 57646), (703, 29192), (712, 28823), (779, 26344), (1406, 14596), (1517, 13528), (1558, 13172), (1691, 12136), (2812, 7298), (3034, 6764), (3116, 6586), (3293, 6232), (3382, 6068), (3649, 5624)]