21729940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{487}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 48206592

約数和(自身を除く): 26476652

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 97, 115, 194, 230, 388, 460, 485, 487, 970, 974, 1940, 1948, 2231, 2435, 4462, 4870, 8924, 9740, 11155, 11201, 22310, 22402, 44620, 44804, 47239, 56005, 94478, 112010, 188956, 224020, 236195, 472390, 944780, 1086497, 2172994, 4345988, 5432485, 10864970, 21729940]

約数ペア:

[(1, 21729940), (2, 10864970), (4, 5432485), (5, 4345988), (10, 2172994), (20, 1086497), (23, 944780), (46, 472390), (92, 236195), (97, 224020), (115, 188956), (194, 112010), (230, 94478), (388, 56005), (460, 47239), (485, 44804), (487, 44620), (970, 22402), (974, 22310), (1940, 11201), (1948, 11155), (2231, 9740), (2435, 8924), (4462, 4870)]