21138404

素因数分解:

$2^2\times 7^4\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:134

約数の個数: 60

約数和(自身を含む): 45174528

約数和(自身を除く): 24036124

約数列:

[1, 2, 4, 7, 14, 28, 31, 49, 62, 71, 98, 124, 142, 196, 217, 284, 343, 434, 497, 686, 868, 994, 1372, 1519, 1988, 2201, 2401, 3038, 3479, 4402, 4802, 6076, 6958, 8804, 9604, 10633, 13916, 15407, 21266, 24353, 30814, 42532, 48706, 61628, 74431, 97412, 107849, 148862, 170471, 215698, 297724, 340942, 431396, 681884, 754943, 1509886, 3019772, 5284601, 10569202, 21138404]

約数ペア:

[(1, 21138404), (2, 10569202), (4, 5284601), (7, 3019772), (14, 1509886), (28, 754943), (31, 681884), (49, 431396), (62, 340942), (71, 297724), (98, 215698), (124, 170471), (142, 148862), (196, 107849), (217, 97412), (284, 74431), (343, 61628), (434, 48706), (497, 42532), (686, 30814), (868, 24353), (994, 21266), (1372, 15407), (1519, 13916), (1988, 10633), (2201, 9604), (2401, 8804), (3038, 6958), (3479, 6076), (4402, 4802)]