20808840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13339}}^1$

素因数の和:13366

約数の個数: 64

約数和(自身を含む): 67233600

約数和(自身を除く): 46424760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13339, 26678, 40017, 53356, 66695, 80034, 106712, 133390, 160068, 173407, 200085, 266780, 320136, 346814, 400170, 520221, 533560, 693628, 800340, 867035, 1040442, 1387256, 1600680, 1734070, 2080884, 2601105, 3468140, 4161768, 5202210, 6936280, 10404420, 20808840]

約数ペア:

[(1, 20808840), (2, 10404420), (3, 6936280), (4, 5202210), (5, 4161768), (6, 3468140), (8, 2601105), (10, 2080884), (12, 1734070), (13, 1600680), (15, 1387256), (20, 1040442), (24, 867035), (26, 800340), (30, 693628), (39, 533560), (40, 520221), (52, 400170), (60, 346814), (65, 320136), (78, 266780), (104, 200085), (120, 173407), (130, 160068), (156, 133390), (195, 106712), (260, 80034), (312, 66695), (390, 53356), (520, 40017), (780, 26678), (1560, 13339)]