21179960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31147}}^1$

素因数の和:31175

約数の個数: 32

約数和(自身を含む): 50459760

約数和(自身を除く): 29279800

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31147, 62294, 124588, 155735, 249176, 311470, 529499, 622940, 1058998, 1245880, 2117996, 2647495, 4235992, 5294990, 10589980, 21179960]

約数ペア:

[(1, 21179960), (2, 10589980), (4, 5294990), (5, 4235992), (8, 2647495), (10, 2117996), (17, 1245880), (20, 1058998), (34, 622940), (40, 529499), (68, 311470), (85, 249176), (136, 155735), (170, 124588), (340, 62294), (680, 31147)]