21076458

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 47752320

約数和(自身を除く): 26675862

約数列:

[1, 2, 3, 6, 13, 26, 37, 39, 67, 74, 78, 109, 111, 134, 201, 218, 222, 327, 402, 481, 654, 871, 962, 1417, 1443, 1742, 2479, 2613, 2834, 2886, 4033, 4251, 4958, 5226, 7303, 7437, 8066, 8502, 12099, 14606, 14874, 21909, 24198, 32227, 43818, 52429, 64454, 94939, 96681, 104858, 157287, 189878, 193362, 270211, 284817, 314574, 540422, 569634, 810633, 1621266, 3512743, 7025486, 10538229, 21076458]

約数ペア:

[(1, 21076458), (2, 10538229), (3, 7025486), (6, 3512743), (13, 1621266), (26, 810633), (37, 569634), (39, 540422), (67, 314574), (74, 284817), (78, 270211), (109, 193362), (111, 189878), (134, 157287), (201, 104858), (218, 96681), (222, 94939), (327, 64454), (402, 52429), (481, 43818), (654, 32227), (871, 24198), (962, 21909), (1417, 14874), (1443, 14606), (1742, 12099), (2479, 8502), (2613, 8066), (2834, 7437), (2886, 7303), (4033, 5226), (4251, 4958)]