19997748

素因数分解:

$2^2\times 3^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:333

約数の個数: 72

約数和(自身を含む): 52835328

約数和(自身を除く): 32837580

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 47, 53, 94, 106, 141, 159, 188, 212, 223, 282, 318, 423, 446, 477, 564, 636, 669, 846, 892, 954, 1338, 1692, 1908, 2007, 2491, 2676, 4014, 4982, 7473, 8028, 9964, 10481, 11819, 14946, 20962, 22419, 23638, 29892, 31443, 35457, 41924, 44838, 47276, 62886, 70914, 89676, 94329, 106371, 125772, 141828, 188658, 212742, 377316, 425484, 555493, 1110986, 1666479, 2221972, 3332958, 4999437, 6665916, 9998874, 19997748]

約数ペア:

[(1, 19997748), (2, 9998874), (3, 6665916), (4, 4999437), (6, 3332958), (9, 2221972), (12, 1666479), (18, 1110986), (36, 555493), (47, 425484), (53, 377316), (94, 212742), (106, 188658), (141, 141828), (159, 125772), (188, 106371), (212, 94329), (223, 89676), (282, 70914), (318, 62886), (423, 47276), (446, 44838), (477, 41924), (564, 35457), (636, 31443), (669, 29892), (846, 23638), (892, 22419), (954, 20962), (1338, 14946), (1692, 11819), (1908, 10481), (2007, 9964), (2491, 8028), (2676, 7473), (4014, 4982)]