21739720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^2\times {\mathrm{397}}^1$

素因数の和:482

約数の個数: 48

約数和(自身を含む): 50398740

約数和(自身を除く): 28659020

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 397, 740, 794, 1369, 1480, 1588, 1985, 2738, 3176, 3970, 5476, 6845, 7940, 10952, 13690, 14689, 15880, 27380, 29378, 54760, 58756, 73445, 117512, 146890, 293780, 543493, 587560, 1086986, 2173972, 2717465, 4347944, 5434930, 10869860, 21739720]

約数ペア:

[(1, 21739720), (2, 10869860), (4, 5434930), (5, 4347944), (8, 2717465), (10, 2173972), (20, 1086986), (37, 587560), (40, 543493), (74, 293780), (148, 146890), (185, 117512), (296, 73445), (370, 58756), (397, 54760), (740, 29378), (794, 27380), (1369, 15880), (1480, 14689), (1588, 13690), (1985, 10952), (2738, 7940), (3176, 6845), (3970, 5476)]