21387930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:395

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 32802150

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 139, 223, 230, 278, 345, 417, 446, 669, 690, 695, 834, 1115, 1338, 1390, 2085, 2230, 3197, 3345, 4170, 5129, 6394, 6690, 9591, 10258, 15387, 15985, 19182, 25645, 30774, 30997, 31970, 47955, 51290, 61994, 76935, 92991, 95910, 153870, 154985, 185982, 309970, 464955, 712931, 929910, 1425862, 2138793, 3564655, 4277586, 7129310, 10693965, 21387930]

約数ペア:

[(1, 21387930), (2, 10693965), (3, 7129310), (5, 4277586), (6, 3564655), (10, 2138793), (15, 1425862), (23, 929910), (30, 712931), (46, 464955), (69, 309970), (115, 185982), (138, 154985), (139, 153870), (223, 95910), (230, 92991), (278, 76935), (345, 61994), (417, 51290), (446, 47955), (669, 31970), (690, 30997), (695, 30774), (834, 25645), (1115, 19182), (1338, 15985), (1390, 15387), (2085, 10258), (2230, 9591), (3197, 6690), (3345, 6394), (4170, 5129)]