21144340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7949}}^1$

素因数の和:7984

約数の個数: 48

約数和(自身を含む): 53424000

約数和(自身を除く): 32279660

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7949, 15898, 31796, 39745, 55643, 79490, 111286, 151031, 158980, 222572, 278215, 302062, 556430, 604124, 755155, 1057217, 1112860, 1510310, 2114434, 3020620, 4228868, 5286085, 10572170, 21144340]

約数ペア:

[(1, 21144340), (2, 10572170), (4, 5286085), (5, 4228868), (7, 3020620), (10, 2114434), (14, 1510310), (19, 1112860), (20, 1057217), (28, 755155), (35, 604124), (38, 556430), (70, 302062), (76, 278215), (95, 222572), (133, 158980), (140, 151031), (190, 111286), (266, 79490), (380, 55643), (532, 39745), (665, 31796), (1330, 15898), (2660, 7949)]