20237840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{509}}^1$

素因数の和:600

約数の個数: 80

約数和(自身を含む): 54639360

約数和(自身を除く): 34401520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 509, 560, 568, 710, 994, 1018, 1136, 1420, 1988, 2036, 2485, 2545, 2840, 3563, 3976, 4072, 4970, 5090, 5680, 7126, 7952, 8144, 9940, 10180, 14252, 17815, 19880, 20360, 28504, 35630, 36139, 39760, 40720, 57008, 71260, 72278, 142520, 144556, 180695, 252973, 285040, 289112, 361390, 505946, 578224, 722780, 1011892, 1264865, 1445560, 2023784, 2529730, 2891120, 4047568, 5059460, 10118920, 20237840]

約数ペア:

[(1, 20237840), (2, 10118920), (4, 5059460), (5, 4047568), (7, 2891120), (8, 2529730), (10, 2023784), (14, 1445560), (16, 1264865), (20, 1011892), (28, 722780), (35, 578224), (40, 505946), (56, 361390), (70, 289112), (71, 285040), (80, 252973), (112, 180695), (140, 144556), (142, 142520), (280, 72278), (284, 71260), (355, 57008), (497, 40720), (509, 39760), (560, 36139), (568, 35630), (710, 28504), (994, 20360), (1018, 19880), (1136, 17815), (1420, 14252), (1988, 10180), (2036, 9940), (2485, 8144), (2545, 7952), (2840, 7126), (3563, 5680), (3976, 5090), (4072, 4970)]