21000984004

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1499}}^1\times {\mathrm{3499}}^1$

素因数の和:5033

約数の個数: 96

約数和(自身を含む): 49392000000

約数和(自身を除く): 28391015996

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 1499, 2002, 2998, 3499, 4004, 5996, 6998, 10493, 13996, 16489, 19487, 20986, 24493, 32978, 38489, 38974, 41972, 45487, 48986, 65956, 76978, 77948, 90974, 97972, 115423, 136409, 153956, 181948, 214357, 230846, 269423, 272818, 318409, 428714, 461692, 500357, 538846, 545636, 636818, 857428, 1000714, 1077692, 1273636, 1500499, 2001428, 3000998, 3502499, 5245001, 6001996, 7004998, 10490002, 14009996, 20980004, 36715007, 57695011, 68185013, 73430014, 115390022, 136370026, 146860028, 230780044, 272740052, 403865077, 477295091, 750035143, 807730154, 954590182, 1500070286, 1615460308, 1909180364, 3000140572, 5250246001, 10500492002, 21000984004]

約数ペア:

[(1, 21000984004), (2, 10500492002), (4, 5250246001), (7, 3000140572), (11, 1909180364), (13, 1615460308), (14, 1500070286), (22, 954590182), (26, 807730154), (28, 750035143), (44, 477295091), (52, 403865077), (77, 272740052), (91, 230780044), (143, 146860028), (154, 136370026), (182, 115390022), (286, 73430014), (308, 68185013), (364, 57695011), (572, 36715007), (1001, 20980004), (1499, 14009996), (2002, 10490002), (2998, 7004998), (3499, 6001996), (4004, 5245001), (5996, 3502499), (6998, 3000998), (10493, 2001428), (13996, 1500499), (16489, 1273636), (19487, 1077692), (20986, 1000714), (24493, 857428), (32978, 636818), (38489, 545636), (38974, 538846), (41972, 500357), (45487, 461692), (48986, 428714), (65956, 318409), (76978, 272818), (77948, 269423), (90974, 230846), (97972, 214357), (115423, 181948), (136409, 153956)]