20381452

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:471

約数の個数: 72

約数和(自身を含む): 47145840

約数和(自身を除く): 26764388

約数列:

[1, 2, 4, 7, 13, 14, 19, 26, 28, 38, 49, 52, 76, 91, 98, 133, 182, 196, 247, 266, 364, 421, 494, 532, 637, 842, 931, 988, 1274, 1684, 1729, 1862, 2548, 2947, 3458, 3724, 5473, 5894, 6916, 7999, 10946, 11788, 12103, 15998, 20629, 21892, 24206, 31996, 38311, 41258, 48412, 55993, 76622, 82516, 103987, 111986, 153244, 207974, 223972, 268177, 391951, 415948, 536354, 727909, 783902, 1072708, 1455818, 1567804, 2911636, 5095363, 10190726, 20381452]

約数ペア:

[(1, 20381452), (2, 10190726), (4, 5095363), (7, 2911636), (13, 1567804), (14, 1455818), (19, 1072708), (26, 783902), (28, 727909), (38, 536354), (49, 415948), (52, 391951), (76, 268177), (91, 223972), (98, 207974), (133, 153244), (182, 111986), (196, 103987), (247, 82516), (266, 76622), (364, 55993), (421, 48412), (494, 41258), (532, 38311), (637, 31996), (842, 24206), (931, 21892), (988, 20629), (1274, 15998), (1684, 12103), (1729, 11788), (1862, 10946), (2548, 7999), (2947, 6916), (3458, 5894), (3724, 5473)]