20003984

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1249}}^1$

素因数の和:1288

約数の個数: 80

約数和(自身を含む): 52080000

約数和(自身を除く): 32076016

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 16, 22, 26, 28, 44, 52, 56, 77, 88, 91, 104, 112, 143, 154, 176, 182, 208, 286, 308, 364, 572, 616, 728, 1001, 1144, 1232, 1249, 1456, 2002, 2288, 2498, 4004, 4996, 8008, 8743, 9992, 13739, 16016, 16237, 17486, 19984, 27478, 32474, 34972, 54956, 64948, 69944, 96173, 109912, 113659, 129896, 139888, 178607, 192346, 219824, 227318, 259792, 357214, 384692, 454636, 714428, 769384, 909272, 1250249, 1428856, 1538768, 1818544, 2500498, 2857712, 5000996, 10001992, 20003984]

約数ペア:

[(1, 20003984), (2, 10001992), (4, 5000996), (7, 2857712), (8, 2500498), (11, 1818544), (13, 1538768), (14, 1428856), (16, 1250249), (22, 909272), (26, 769384), (28, 714428), (44, 454636), (52, 384692), (56, 357214), (77, 259792), (88, 227318), (91, 219824), (104, 192346), (112, 178607), (143, 139888), (154, 129896), (176, 113659), (182, 109912), (208, 96173), (286, 69944), (308, 64948), (364, 54956), (572, 34972), (616, 32474), (728, 27478), (1001, 19984), (1144, 17486), (1232, 16237), (1249, 16016), (1456, 13739), (2002, 9992), (2288, 8743), (2498, 8008), (4004, 4996)]