21123240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1709}}^1$

素因数の和:1826

約数の個数: 64

約数和(自身を含む): 64022400

約数和(自身を除く): 42899160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 103, 120, 206, 309, 412, 515, 618, 824, 1030, 1236, 1545, 1709, 2060, 2472, 3090, 3418, 4120, 5127, 6180, 6836, 8545, 10254, 12360, 13672, 17090, 20508, 25635, 34180, 41016, 51270, 68360, 102540, 176027, 205080, 352054, 528081, 704108, 880135, 1056162, 1408216, 1760270, 2112324, 2640405, 3520540, 4224648, 5280810, 7041080, 10561620, 21123240]

約数ペア:

[(1, 21123240), (2, 10561620), (3, 7041080), (4, 5280810), (5, 4224648), (6, 3520540), (8, 2640405), (10, 2112324), (12, 1760270), (15, 1408216), (20, 1056162), (24, 880135), (30, 704108), (40, 528081), (60, 352054), (103, 205080), (120, 176027), (206, 102540), (309, 68360), (412, 51270), (515, 41016), (618, 34180), (824, 25635), (1030, 20508), (1236, 17090), (1545, 13672), (1709, 12360), (2060, 10254), (2472, 8545), (3090, 6836), (3418, 6180), (4120, 5127)]