21271796780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{103171}}^1$

素因数の和:103267

約数の個数: 72

約数和(自身を含む): 49164759504

約数和(自身を除く): 27892962724

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 169, 244, 260, 305, 338, 610, 676, 793, 845, 1220, 1586, 1690, 3172, 3380, 3965, 7930, 10309, 15860, 20618, 41236, 51545, 103090, 103171, 206180, 206342, 412684, 515855, 1031710, 1341223, 2063420, 2682446, 5364892, 6293431, 6706115, 12586862, 13412230, 17435899, 25173724, 26824460, 31467155, 34871798, 62934310, 69743596, 81814603, 87179495, 125868620, 163629206, 174358990, 327258412, 348717980, 409073015, 818146030, 1063589839, 1636292060, 2127179678, 4254359356, 5317949195, 10635898390, 21271796780]

約数ペア:

[(1, 21271796780), (2, 10635898390), (4, 5317949195), (5, 4254359356), (10, 2127179678), (13, 1636292060), (20, 1063589839), (26, 818146030), (52, 409073015), (61, 348717980), (65, 327258412), (122, 174358990), (130, 163629206), (169, 125868620), (244, 87179495), (260, 81814603), (305, 69743596), (338, 62934310), (610, 34871798), (676, 31467155), (793, 26824460), (845, 25173724), (1220, 17435899), (1586, 13412230), (1690, 12586862), (3172, 6706115), (3380, 6293431), (3965, 5364892), (7930, 2682446), (10309, 2063420), (15860, 1341223), (20618, 1031710), (41236, 515855), (51545, 412684), (103090, 206342), (103171, 206180)]