21653864

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{569}}^1$

素因数の和:713

約数の個数: 32

約数和(自身を含む): 41860800

約数和(自身を除く): 20206936

約数列:

[1, 2, 4, 8, 67, 71, 134, 142, 268, 284, 536, 568, 569, 1138, 2276, 4552, 4757, 9514, 19028, 38056, 38123, 40399, 76246, 80798, 152492, 161596, 304984, 323192, 2706733, 5413466, 10826932, 21653864]

約数ペア:

[(1, 21653864), (2, 10826932), (4, 5413466), (8, 2706733), (67, 323192), (71, 304984), (134, 161596), (142, 152492), (268, 80798), (284, 76246), (536, 40399), (568, 38123), (569, 38056), (1138, 19028), (2276, 9514), (4552, 4757)]