20737600

素因数分解:

$2^6\times 5^2\times {\mathrm{13}}^1\times {\mathrm{997}}^1$

素因数の和:1032

約数の個数: 84

約数和(自身を含む): 55007764

約数和(自身を除く): 34270164

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 130, 160, 200, 208, 260, 320, 325, 400, 416, 520, 650, 800, 832, 997, 1040, 1300, 1600, 1994, 2080, 2600, 3988, 4160, 4985, 5200, 7976, 9970, 10400, 12961, 15952, 19940, 20800, 24925, 25922, 31904, 39880, 49850, 51844, 63808, 64805, 79760, 99700, 103688, 129610, 159520, 199400, 207376, 259220, 319040, 324025, 398800, 414752, 518440, 648050, 797600, 829504, 1036880, 1296100, 1595200, 2073760, 2592200, 4147520, 5184400, 10368800, 20737600]

約数ペア:

[(1, 20737600), (2, 10368800), (4, 5184400), (5, 4147520), (8, 2592200), (10, 2073760), (13, 1595200), (16, 1296100), (20, 1036880), (25, 829504), (26, 797600), (32, 648050), (40, 518440), (50, 414752), (52, 398800), (64, 324025), (65, 319040), (80, 259220), (100, 207376), (104, 199400), (130, 159520), (160, 129610), (200, 103688), (208, 99700), (260, 79760), (320, 64805), (325, 63808), (400, 51844), (416, 49850), (520, 39880), (650, 31904), (800, 25922), (832, 24925), (997, 20800), (1040, 19940), (1300, 15952), (1600, 12961), (1994, 10400), (2080, 9970), (2600, 7976), (3988, 5200), (4160, 4985)]